vendor/emmet.js
function(name, collection) {
			if (collection in elementTypes) {
				elementTypes[collection] = _.without(this.getCollection(collection), name);
			}
		}
function(name, collection) {
			if (collection in elementTypes) {
				elementTypes[collection] = _.without(this.getCollection(collection), name);
			}
		}
Removes element name from specified collection
@param {String} name Element name
@param {String} collection Collection name
@returns