refactor: Reuse unused kotlin imports

Signed-off-by: Krille <c.kussowski@famedly.com>

android/app/src/main/kotlin/chat/fluffy/fluffychat/FcmPushService.kt

@@ -2,17 +2,9 @@
 
 import com.famedly.fcm_shared_isolate.FcmSharedIsolateService
 
-import chat.fluffy.fluffychat.MainActivity
-
-import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.view.FlutterMain
 import io.flutter.embedding.engine.dart.DartExecutor.DartEntrypoint
-
 import android.content.Context
-import android.os.Bundle
-import android.util.Log
-import android.view.WindowManager
 
 class FcmPushService : FcmSharedIsolateService() {
     override fun getEngine(): FlutterEngine {