Complete identity removal module. (#2993)

.internal/baseOrderBy.js

@@ -2,7 +2,6 @@ import arrayMap from './arrayMap.js'
 import baseMap from './baseMap.js'
 import baseSortBy from './baseSortBy.js'
 import compareMultiple from './compareMultiple.js'
-import identity from '../identity.js'
 
 /**
  * The base implementation of `orderBy` without param guards.
@@ -15,7 +14,7 @@ import identity from '../identity.js'
  */
 function baseOrderBy(collection, iteratees, orders) {
   let index = -1
-  iteratees = iteratees.length ? iteratees : [identity]
+  iteratees = iteratees.length ? iteratees : [value => value]
 
   const result = baseMap(collection, (value, key, collection) => {
     const criteria = arrayMap(iteratees, iteratee => iteratee(value))

.internal/baseSetToString.js

@@ -1,6 +1,3 @@
-import constant from '../constant.js'
-import identity from '../identity.js'
-
 /**
  * The base implementation of `setToString` without support for hot loop shorting.
  *
@@ -13,7 +10,7 @@ function baseSetToString(func, string){
   return Object.defineProperty(func, 'toString', {
     'configurable': true,
     'enumerable': false,
-    'value': constant(string),
+    'value': () => string,
     'writable': true
   })
 }

.internal/baseSortedIndex.js

@@ -1,5 +1,4 @@
 import baseSortedIndexBy from './baseSortedIndexBy.js'
-import identity from '../identity.js'
 import isSymbol from '../isSymbol.js'
 
 /** Used as references for the maximum length and index of an array. */
@@ -35,7 +34,7 @@ function baseSortedIndex(array, value, retHighest) {
     }
     return high
   }
-  return baseSortedIndexBy(array, value, identity, retHighest)
+  return baseSortedIndexBy(array, value, value => value, retHighest)
 }
 
 export default baseSortedIndex

mean.js

@@ -1,5 +1,4 @@
 import baseMean from './meanBy.js'
-import identity from './identity.js'
 
 /**
  * Computes the mean of the values in `array`.
@@ -14,7 +13,7 @@ import identity from './identity.js'
  * // => 5
  */
 function mean(array) {
-  return baseMean(array, identity)
+  return baseMean(array, value => value)
 }
 
 export default mean

sum.js

@@ -1,5 +1,4 @@
 import baseSum from './.internal/baseSum.js'
-import identity from './identity.js'
 
 /**
  * Computes the sum of the values in `array`.
@@ -15,7 +14,7 @@ import identity from './identity.js'
  */
 function sum(array) {
   return (array && array.length)
-    ? baseSum(array, identity)
+    ? baseSum(array, value => value)
     : 0
 }