diff --git a/assignIn.js b/assignIn.js
deleted file mode 100644
index a20b9e5b6..000000000
--- a/assignIn.js
+++ /dev/null
@@ -1,38 +0,0 @@
-import copyObject from './.internal/copyObject.js';
-import createAssigner from './.internal/createAssigner.js';
-import keysIn from './keysIn.js';
-
-/**
- * This method is like `assign` except that it iterates over own and
- * inherited source properties.
- *
- * **Note:** This method mutates `object`.
- *
- * @since 4.0.0
- * @alias extend
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
- * @see assign
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- * }
- *
- * function Bar() {
- *   this.c = 3;
- * }
- *
- * Foo.prototype.b = 2;
- * Bar.prototype.d = 4;
- *
- * assignIn({ 'a': 0 }, new Foo, new Bar);
- * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
- */
-const assignIn = createAssigner((object, source) => {
-  copyObject(source, keysIn(source), object);
-});
-
-export default assignIn;
diff --git a/assignInWith.js b/assignInWith.js
deleted file mode 100644
index 7eca9a6af..000000000
--- a/assignInWith.js
+++ /dev/null
@@ -1,36 +0,0 @@
-import copyObject from './.internal/copyObject.js';
-import createAssigner from './.internal/createAssigner.js';
-import keysIn from './keysIn.js';
-
-/**
- * This method is like `assignIn` except that it accepts `customizer`
- * which is invoked to produce the assigned values. If `customizer` returns
- * `undefined`, assignment is handled by the method instead. The `customizer`
- * is invoked with five arguments: (objValue, srcValue, key, object, source).
- *
- * **Note:** This method mutates `object`.
- *
- * @since 4.0.0
- * @alias extendWith
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
- * @see assignWith
- * @example
- *
- * function customizer(objValue, srcValue) {
- *   return isUndefined(objValue) ? srcValue : objValue;
- * }
- *
- * const defaults = partialRight(assignInWith, customizer);
- *
- * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
- * // => { 'a': 1, 'b': 2 }
- */
-const assignInWith = createAssigner((object, source, srcIndex, customizer) => {
-  copyObject(source, keysIn(source), object, customizer);
-});
-
-export default assignInWith;
diff --git a/entriesIn.js b/entriesIn.js
deleted file mode 100644
index 316ee4def..000000000
--- a/entriesIn.js
+++ /dev/null
@@ -1 +0,0 @@
-export { default } from './toPairsIn.js';
diff --git a/extend.js b/extend.js
deleted file mode 100644
index ff80fb562..000000000
--- a/extend.js
+++ /dev/null
@@ -1 +0,0 @@
-export { default } from './assignIn.js';
diff --git a/extendWith.js b/extendWith.js
deleted file mode 100644
index f94fd8fd9..000000000
--- a/extendWith.js
+++ /dev/null
@@ -1 +0,0 @@
-export { default } from './assignInWith.js';
diff --git a/forIn.js b/forIn.js
deleted file mode 100644
index 879c4ba6e..000000000
--- a/forIn.js
+++ /dev/null
@@ -1,34 +0,0 @@
-import baseFor from './.internal/baseFor.js';
-import keysIn from './keysIn.js';
-
-/**
- * Iterates over own and inherited enumerable string keyed properties of an
- * object and invokes `iteratee` for each property. The iteratee is invoked
- * with three arguments: (value, key, object). Iteratee functions may exit
- * iteration early by explicitly returning `false`.
- *
- * @since 0.3.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- * @see forEach, forEachRight, forInRight, forOwn, forOwnRight
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * forIn(new Foo, function(value, key) {
- *   console.log(key);
- * });
- * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
- */
-function forIn(object, iteratee) {
-  return object == null ? object : baseFor(object, iteratee, keysIn);
-}
-
-export default forIn;
diff --git a/forInRight.js b/forInRight.js
deleted file mode 100644
index 923b8ff3c..000000000
--- a/forInRight.js
+++ /dev/null
@@ -1,32 +0,0 @@
-import baseForRight from './.internal/baseForRight.js';
-import keysIn from './keysIn.js';
-
-/**
- * This method is like `forIn` except that it iterates over properties of
- * `object` in the opposite order.
- *
- * @since 2.0.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- * @see forEach, forEachRight, forIn, forOwn, forOwnRight
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * forInRight(new Foo, function(value, key) {
- *   console.log(key);
- * });
- * // => Logs 'c', 'b', then 'a' assuming `forIn` logs 'a', 'b', then 'c'.
- */
-function forInRight(object, iteratee) {
-  return object == null ? object : baseForRight(object, iteratee, keysIn);
-}
-
-export default forInRight;
diff --git a/functionsIn.js b/functionsIn.js
deleted file mode 100644
index 9747534a7..000000000
--- a/functionsIn.js
+++ /dev/null
@@ -1,29 +0,0 @@
-import baseFunctions from './.internal/baseFunctions.js';
-import keysIn from './keysIn.js';
-
-/**
- * Creates an array of function property names from own and inherited
- * enumerable properties of `object`.
- *
- * @since 4.0.0
- * @category Object
- * @param {Object} object The object to inspect.
- * @returns {Array} Returns the function names.
- * @see functions
- * @example
- *
- * function Foo() {
- *   this.a = constant('a');
- *   this.b = constant('b');
- * }
- *
- * Foo.prototype.c = constant('c');
- *
- * functionsIn(new Foo);
- * // => ['a', 'b', 'c']
- */
-function functionsIn(object) {
-  return object == null ? [] : baseFunctions(object, keysIn(object));
-}
-
-export default functionsIn;
diff --git a/keysIn.js b/keysIn.js
deleted file mode 100644
index 90219685a..000000000
--- a/keysIn.js
+++ /dev/null
@@ -1,30 +0,0 @@
-import arrayLikeKeys from './.internal/arrayLikeKeys.js';
-import baseKeysIn from './.internal/baseKeysIn.js';
-import isArrayLike from './isArrayLike.js';
-
-/**
- * Creates an array of the own and inherited enumerable property names of `object`.
- *
- * **Note:** Non-object values are coerced to objects.
- *
- * @since 3.0.0
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * keysIn(new Foo);
- * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
- */
-function keysIn(object) {
-  return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
-}
-
-export default keysIn;
diff --git a/toPairsIn.js b/toPairsIn.js
deleted file mode 100644
index ab5ad8bb1..000000000
--- a/toPairsIn.js
+++ /dev/null
@@ -1,40 +0,0 @@
-import arrayMap from './.internal/arrayMap.js';
-import getTag from './.internal/getTag.js';
-import mapToArray from './.internal/mapToArray.js';
-import setToPairs from './.internal/setToPairs.js';
-import keysIn from './keysIn.js';
-
-/**
- * Creates an array of own and inherited enumerable string keyed-value pairs
- * for `object` which can be consumed by `fromPairs`. If `object` is a map
- * or set, its entries are returned.
- *
- * @since 4.0.0
- * @alias entriesIn
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the key-value pairs.
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * toPairsIn(new Foo);
- * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
- */
-function toPairsIn(object) {
-  const tag = getTag(object);
-  if (tag == '[object Map]') {
-    return mapToArray(object);
-  }
-  if (tag == '[object Set]') {
-    return setToPairs(object);
-  }
-  return arrayMap(keysIn(object), key => [key, object[key]]);
-}
-
-export default toPairsIn;
diff --git a/valuesIn.js b/valuesIn.js
deleted file mode 100644
index 0a9f845a4..000000000
--- a/valuesIn.js
+++ /dev/null
@@ -1,30 +0,0 @@
-import baseValues from './.internal/baseValues.js';
-import keysIn from './keysIn.js';
-
-/**
- * Creates an array of the own and inherited enumerable string keyed property
- * values of `object`.
- *
- * **Note:** Non-object values are coerced to objects.
- *
- * @since 3.0.0
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property values.
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * valuesIn(new Foo);
- * // => [1, 2, 3] (iteration order is not guaranteed)
- */
-function valuesIn(object) {
-  return object == null ? [] : baseValues(object, keysIn(object));
-}
-
-export default valuesIn;