remove androidx manifest

Author: pknotfound

app/src/main/AndroidManifest.xml

@@ -9,7 +9,6 @@
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
-        android:useAndroidX="true"
         android:supportsRtl="true"
         android:theme="@style/Theme.OpenGraphPreview">
         <activity android:name=".MainActivity">