Bump to v4.1.0.

_mapDelete.js

@@ -0,0 +1,21 @@
+define(['./_Map', './_assocDelete', './_hashDelete', './_isKeyable'], function(Map, assocDelete, hashDelete, isKeyable) {
+
+  /**
+   * Removes `key` and its value from the map.
+   *
+   * @private
+   * @name delete
+   * @memberOf MapCache
+   * @param {string} key The key of the value to remove.
+   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+   */
+  function mapDelete(key) {
+    var data = this.__data__;
+    if (isKeyable(key)) {
+      return hashDelete(typeof key == 'string' ? data.string : data.hash, key);
+    }
+    return Map ? data.map['delete'](key) : assocDelete(data.map, key);
+  }
+
+  return mapDelete;
+});