largefiles: avoid checking requirements on every command

When largefiles is enabled, commands on large repositories which don't
require largefiles could be slowed down substantially. Disable
checking this for every command.

hgext/largefiles/reposetup.py

@@ -405,7 +405,5 b' def reposetup(ui, repo):'
             repo.requirements.add('largefiles')
             repo._writerequirements()
 
-    checkrequireslfiles(ui, repo)
-
     ui.setconfig('hooks', 'changegroup.lfiles', checkrequireslfiles)
     ui.setconfig('hooks', 'commit.lfiles', checkrequireslfiles)