Backed out changeset 430ce13b63f3 (bug 482878)

Bug 482670 restored un-wrapped payloads, so until a version bump, those using trunk will need to do a manual server wipe.

services/sync/modules/service.js

@@ -612,12 +612,6 @@ WeaveSvc.prototype = {
     let meta = yield Records.import(self.cb, this.clusterURL + this.username +
                                              "/meta/global");
 
-    // XXX Bug 482878 Old payloads weren't array-wrapped, so migrate by wiping
-    if (meta && meta.payload == null) {
-      this._log.debug("Migrating to minimal payloads by wiping the server");
-      meta = null;
-    }
-
     let remoteVersion = (meta && meta.payload.storageVersion)?
       meta.payload.storageVersion : "";