EventIndex: Move the checkpoint loading logic into the init method.

The checkpoints don't seem to be loaded anymore in the onSync method,
the reason why this has stopped working is left unexplored since loading
the checkpoints makes most sense during the initialization step anyways.

src/indexing/EventIndexPeg.js

@@ -55,8 +55,6 @@ class EventIndexPeg {
             return false;
         }
 
-        console.log("EventIndex: Successfully initialized the event index");
-
         this.index = index;
 
         return true;