fix(estimated-document-count): support options other than maxTimeMs

Author: mbroadst

lib/collection.js

@@ -1388,8 +1388,6 @@ Collection.prototype.estimatedDocumentCount = function(options, callback) {
   if (typeof options === 'function') (callback = options), (options = {});
   options = options || {};
 
-  options = typeof options.maxTimeMS === 'number' ? options : {};
-
   return executeOperation(this.s.topology, count, [this, null, options, callback]);
 };