remove `loadMediatorClass(Realm)` since `loadMediatorClass(Realm)` and `setupColumnIndices(Realm)` are completely the same.
remove `loadMediatorClass(Realm)` since `loadMediatorClass(Realm)` and `setupColumnIndices(Realm)` are completely the same.

teddywest32/realm-java,realm/realm-java,realm/realm-java,ShikaSD/realm-java,ShikaSD/realm-java,realm/realm-java,teddywest32/realm-java,realm/realm-java,teddywest32/realm-java,teddywest32/realm-java,realm/realm-java,ShikaSD/realm-java,ShikaSD/realm-java,realm/realm-java,ShikaSD/realm-java,realm/realm-java,horie1024/realm-java,horie1024/realm-java,teddywest32/realm-java,horie1024/realm-java