Remove baseNth.

.internal/baseNth.js

@@ -1,20 +0,0 @@
-import isIndex from './isIndex.js'
-
-/**
- * The base implementation of `nth` which doesn't coerce arguments.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {number} n The index of the element to return.
- * @returns {*} Returns the nth element of `array`.
- */
-function baseNth(array, n) {
-  const { length } = array
-  if (!length) {
-    return
-  }
-  n += n < 0 ? length : 0
-  return isIndex(n, length) ? array[n] : undefined
-}
-
-export default baseNth