Fix pixel.gif location
Remove dead language variable
Remove forgotten code

I discovered this by chance. Seems to go back to the MyBB 1.0 days, the last change being in 2005. Away with thee!
Improve language consistency
Remove unused language variables
Merge branch 'feature' of github.com:mybb/mybb into feature

Conflicts:
	inc/languages/english/admin/user_users.lang.php