Remove unused import

Author: brarcher

app/src/main/java/protect/videotranscoder/activity/MainActivity.java

@@ -27,7 +27,6 @@
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;
-import android.widget.SpinnerAdapter;
 import android.widget.TextView;
 import android.widget.Toast;
 import android.widget.VideoView;