Fixed errcheck issues in server/channels/app/group_test.go (#28938)

server/.golangci.yml

@@ -109,7 +109,6 @@ issues:
         channels/app/file_helper_test.go|\
         channels/app/file_info.go|\
         channels/app/file_test.go|\
-        channels/app/group_test.go|\
         channels/app/helper_test.go|\
         channels/app/imaging/decode.go|\
         channels/app/imaging/decode_test.go|\

server/channels/app/group_test.go

@@ -441,7 +441,8 @@ func TestUserIsInAdminRoleGroup(t *testing.T) {
 	require.True(t, actual)
 
 	// delete the syncable, should be false again
-	th.App.DeleteGroupSyncable(group2.Id, th.BasicTeam.Id, model.GroupSyncableTypeTeam)
+	_, appErr := th.App.DeleteGroupSyncable(group2.Id, th.BasicTeam.Id, model.GroupSyncableTypeTeam)
+	require.Nil(t, appErr)
 	actual, err = th.App.UserIsInAdminRoleGroup(th.BasicUser.Id, th.BasicTeam.Id, model.GroupSyncableTypeTeam)
 	require.Nil(t, err)
 	require.False(t, actual)