ios: avoid adding toolchains that we don't use in the kits

Change-Id: Ic6f13dea277500fc9d3c3fb3b08069998d4b65ce
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
ios: remove empty action from simulator

Task-number: QTCREATORBUG-10705
Change-Id: Ie5c1e94a012cbdfb7cc69a3430fcad3c779e8bbe
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>