Revert "Do not count deleted channels when checking max channel limit (#12021)" (#12730)

This reverts commit d6700e3b40.

app/channel_test.go

@@ -1000,18 +1000,3 @@ func TestSearchChannelsForUser(t *testing.T) {
 		searchAndCheck(t, "dev", []string{"test-dev-1", "test-dev-2", "dev-3"})
 	})
 }
-
-func TestGetNumberOfChannelsOnTeam(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-
-	th.App.DeleteChannel(th.BasicChannel, th.BasicUser.Id)
-
-	count, err := th.App.GetNumberOfChannelsOnTeam(th.BasicTeam.Id, true)
-	require.Nil(t, err)
-	assert.Equal(t, 3, count)
-
-	count, err = th.App.GetNumberOfChannelsOnTeam(th.BasicTeam.Id, false)
-	require.Nil(t, err)
-	assert.Equal(t, 2, count)
-}