Remove unnecessary MultiDex library

(cherry picked from commit f2fca0f13d)

# Conflicts:
#	app/build.gradle.kts

app/src/main/java/eu/kanade/tachiyomi/App.kt

@@ -19,7 +19,6 @@ import androidx.lifecycle.LifecycleObserver
 import androidx.lifecycle.OnLifecycleEvent
 import androidx.lifecycle.ProcessLifecycleOwner
 import androidx.lifecycle.lifecycleScope
-import androidx.multidex.MultiDex
 import coil.ImageLoader
 import coil.ImageLoaderFactory
 import coil.decode.GifDecoder
@@ -143,11 +142,6 @@ open class App : Application(), LifecycleObserver, ImageLoaderFactory {
             }.launchIn(ProcessLifecycleOwner.get().lifecycleScope)
     }
 
-    override fun attachBaseContext(base: Context) {
-        super.attachBaseContext(base)
-        MultiDex.install(this)
-    }
-
     override fun newImageLoader(): ImageLoader {
         return ImageLoader.Builder(this).apply {
             componentRegistry {