Remove commented code

src/com/owncloud/android/providers/UsersAndGroupsSearchProvider.java

@@ -31,14 +31,12 @@ import android.database.MatrixCursor;
 import android.net.Uri;
 import android.provider.BaseColumns;
 import android.support.annotation.Nullable;
-import android.util.Pair;
 
 import com.owncloud.android.R;
 import com.owncloud.android.authentication.AccountUtils;
 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
 import com.owncloud.android.lib.common.utils.Log_OC;
 import com.owncloud.android.lib.resources.shares.GetRemoteShareesOperation;
-import com.owncloud.android.lib.resources.shares.ShareType;
 
 import org.json.JSONException;
 import org.json.JSONObject;