Never reset the taginfo cache

The data on taginfo is refreshed once per day, so there's no reason to
reissue those API calls during a normal editing session.

reset() gets called after the user saves their changes to OSM

modules/services/taginfo.js

@@ -176,7 +176,7 @@ export default {
     },
 
 
-    reset: function() { taginfoCache = {}; },
+    reset: function() { },
 
 
     keys: function(parameters, callback) {