Revert "fix: proprietory classes included into build"

This reverts commit 1ff5851c4ae5ac25998ee29628640ccc7bdf879e

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

@@ -7,13 +7,11 @@ import android.content.Context
 import androidx.multidex.MultiDex
 
 class MainActivity : FlutterActivity() {
-
     override fun attachBaseContext(base: Context) {
         super.attachBaseContext(base)
         MultiDex.install(this)
     }
 
-
     override fun provideFlutterEngine(context: Context): FlutterEngine? {
         return provideEngine(this)
     }