Removed unused imports

app/src/main/java/chat/rocket/android/push/PushNotificationHandler.java

 package chat.rocket.android.push;
 
-import android.annotation.TargetApi;
 import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;

rocket-chat-android-widgets/src/main/java/chat/rocket/android/widget/RocketChatWidgets.java

 package chat.rocket.android.widget;
 
 import android.content.Context;
-import chat.rocket.android.widget.fresco.CustomImageFormatConfigurator;
+
 import com.facebook.common.logging.FLog;
 import com.facebook.drawee.backends.pipeline.DraweeConfig;
 import com.facebook.drawee.backends.pipeline.Fresco;
@@ -9,8 +9,11 @@ import com.facebook.imagepipeline.backends.okhttp3.OkHttpImagePipelineConfigFact
 import com.facebook.imagepipeline.core.ImagePipelineConfig;
 import com.facebook.imagepipeline.listener.RequestListener;
 import com.facebook.imagepipeline.listener.RequestLoggingListener;
+
 import java.util.HashSet;
 import java.util.Set;
+
+import chat.rocket.android.widget.fresco.CustomImageFormatConfigurator;
 import okhttp3.OkHttpClient;
 
 public class RocketChatWidgets {