Delete unused imports

app/src/main/java/chat/rocket/android/layouthelper/chatroom/MessageNormalViewHolder.java

 package chat.rocket.android.layouthelper.chatroom;
 
 import android.view.View;
-
 import chat.rocket.android.R;
 import chat.rocket.android.renderer.MessageRenderer;
 import chat.rocket.android.widget.AbsoluteUrl;
 import chat.rocket.android.widget.message.RocketChatMessageAttachmentsLayout;
 import chat.rocket.android.widget.message.RocketChatMessageLayout;
 import chat.rocket.android.widget.message.RocketChatMessageUrlsLayout;
-import chat.rocket.core.SyncState;
 
 /**
  * ViewData holder of NORMAL chat message.

app/src/main/java/chat/rocket/android/service/observer/LoadMessageProcedureObserver.java

 package chat.rocket.android.service.observer;
 
 import android.content.Context;
-import io.realm.Realm;
-import io.realm.RealmResults;
-import io.realm.Sort;
-import org.json.JSONObject;
-
-import java.util.List;
-import bolts.Task;
 import chat.rocket.android.api.MethodCallHelper;
 import chat.rocket.android.log.RCLog;
+import chat.rocket.android.service.DDPClientRef;
 import chat.rocket.core.SyncState;
+import chat.rocket.persistence.realm.RealmHelper;
 import chat.rocket.persistence.realm.models.ddp.RealmMessage;
 import chat.rocket.persistence.realm.models.internal.LoadMessageProcedure;
-import chat.rocket.persistence.realm.RealmHelper;
-import chat.rocket.android.service.DDPClientRef;
+import io.realm.Realm;
+import io.realm.RealmResults;
+import io.realm.Sort;
+import java.util.List;
+import org.json.JSONObject;
 
 /**
  * Background process for loading messages.