#575 Hotfix for reload support

- Create temporary method for reloading any stateful entities -> a lot of duplicated code, to be fixed soon within #432
- Remove unused methods

src/main/java/fr/xephi/authme/datasource/CacheDataSource.java

@@ -162,12 +162,6 @@ public class CacheDataSource implements DataSource {
         }
     }
 
-    @Override
-    public void reload() { // unused method
-        source.reload();
-        cachedAuths.invalidateAll();
-    }
-
     @Override
     public synchronized boolean updateEmail(final PlayerAuth auth) {
         boolean result = source.updateEmail(auth);