Remove replaceHolders.

.internal/replaceHolders.js

@@ -1,29 +0,0 @@
-/** Used as the internal argument placeholder. */
-const PLACEHOLDER = '__lodash_placeholder__'
-
-/**
- * Replaces all `placeholder` elements in `array` with an internal placeholder
- * and returns an array of their indexes.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {*} placeholder The placeholder to replace.
- * @returns {Array} Returns the new array of placeholder indexes.
- */
-function replaceHolders(array, placeholder) {
-  let index = -1
-  const { length } = array
-  let resIndex = 0
-  const result = []
-
-  while (++index < length) {
-    const value = array[index]
-    if (value === placeholder || value === PLACEHOLDER) {
-      array[index] = PLACEHOLDER
-      result[resIndex++] = index
-    }
-  }
-  return result
-}
-
-export default replaceHolders