Remove “in” variants.

keysIn.js

@@ -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;