remove deprecated method call

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

@@ -38,13 +38,6 @@ public class MethodCallHelper {
   protected final RealmHelper realmHelper;
   protected final DDPClientWrapper ddpClient;
 
-  /**
-   * initialize with ServerConfigId.
-   */
-  public MethodCallHelper(String serverConfigId) {
-    this(null, serverConfigId);
-  }
-
   /**
    * initialize with Context and ServerConfigId.
    */

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

@@ -12,10 +12,6 @@ import bolts.Task;
 import chat.rocket.android.realm_helper.RealmHelper;
 
 public class PushHelper extends MethodCallHelper {
-  public PushHelper(String serverConfigId) {
-    super(serverConfigId);
-  }
-
   public PushHelper(Context context, String serverConfigId) {
     super(context, serverConfigId);
   }

app/src/main/java/chat/rocket/android/push/gcm/GcmRegistrationIntentService.java

 package chat.rocket.android.push.gcm;
 
-import android.app.IntentService;
-import android.content.Intent;
-
 import com.google.android.gms.gcm.GoogleCloudMessaging;
 import com.google.android.gms.iid.InstanceID;
 
+import android.app.IntentService;
+import android.content.Intent;
+
 import java.io.IOException;
 import java.util.List;
 import chat.rocket.android.RocketChatCache;
@@ -59,7 +59,7 @@ public class GcmRegistrationIntentService extends IntentService {
       final User currentUser = realmHelper.executeTransactionForRead(realm ->
           User.queryCurrentUser(realm).findFirst());
 
-      new PushHelper(serverConfig.getServerConfigId()).pushUpdate(
+      new PushHelper(getBaseContext(), serverConfig.getServerConfigId()).pushUpdate(
           RocketChatCache.getPushId(this), token, currentUser != null ? currentUser.getId() : null)
           .onSuccess(task -> {
             markRefreshAsDone(serverConfig);