remove setTimeout to repro issue 1255

lib/extensions.js

@@ -71,13 +71,13 @@ module.exports = function(realmConstructor) {
                     },
                     (error) => {
                         if (error) {
-                            setTimeout(() => {  reject(error); }, 1);
+                            reject(error);
                         }
                         else {
                             try {
                                 let syncedRealm = new realmConstructor(config);
                                 //FIXME: RN hangs here. Remove when node's makeCallback alternative is implemented
-                                setTimeout(() => { resolve(syncedRealm); }, 1);
+                                resolve(syncedRealm);
                             } catch (e) {
                                 reject(e);
                             }