Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

build/javascript/node_modules/lodash/meanBy.js

@@ -1,31 +0,0 @@
-var baseIteratee = require('./_baseIteratee'),
-    baseMean = require('./_baseMean');
-
-/**
- * This method is like `_.mean` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the value to be averaged.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the mean.
- * @example
- *
- * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
- *
- * _.meanBy(objects, function(o) { return o.n; });
- * // => 5
- *
- * // The `_.property` iteratee shorthand.
- * _.meanBy(objects, 'n');
- * // => 5
- */
-function meanBy(array, iteratee) {
-  return baseMean(array, baseIteratee(iteratee, 2));
-}
-
-module.exports = meanBy;