Remove wgAlwaysUseTidy from ExpandTemplates

Remove wgAlwaysUseTidy from ExpandTemplates

Fixes ConfigException:

Exception encountered, of type "ConfigException"
[1235d69e] index.php/Special:ExpandTemplates ConfigException
from line 53 of
	includes/config/GlobalVarConfig.php:
GlobalVarConfig::get: undefined option: 'AlwaysUseTidy'
Backtrace:
	includes/specials/SpecialExpandTemplates.php(117):
GlobalVarConfig->get(string)
i	includes/specialpage/SpecialPage.php(384):
SpecialExpandTemplates->execute(NULL)

Change-Id: Iba16f12f50f7427533f89817eb40f46a2ab58ec4