Delete unused methods.

app/src/main/java/chat/rocket/android/api/MethodCallHelper.java

 package chat.rocket.android.api;
 
 import android.content.Context;
-import android.util.Log;
 import android.util.Patterns;
 import chat.rocket.persistence.realm.models.ddp.RealmSpotlight;
 import org.json.JSONArray;

app/src/main/java/chat/rocket/android/fragment/sidebar/SidebarMainFragment.java

@@ -48,8 +48,6 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
-import rx.Subscriber;
-import rx.functions.Action1;
 
 public class SidebarMainFragment extends AbstractFragment implements SidebarMainContract.View {
   private SidebarMainContract.Presenter presenter;
@@ -306,4 +304,4 @@ public class SidebarMainFragment extends AbstractFragment implements SidebarMain
     updateRoomListMode(user);
   }
 
-}
\ No newline at end of file
+}

app/src/main/java/chat/rocket/android/fragment/sidebar/SidebarMainPresenter.java

@@ -3,7 +3,6 @@ package chat.rocket.android.fragment.sidebar;
 import android.support.annotation.NonNull;
 import android.support.v4.util.Pair;
 
-import chat.rocket.core.SortDirection;
 import chat.rocket.core.models.Spotlight;
 import chat.rocket.persistence.realm.repositories.RealmSpotlightRepository;
 import io.reactivex.Flowable;