AppArmor: remove af_names.h from .gitignore

Commit 4fdef2183e6598cc977a9bb9321ef99a44125da3 ("AppArmor: Cleanup make
file to remove cruft and make it easier to read") removed all traces of
af_names.h from the tree. Remove its entry in AppArmor's .gitignore file
too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

security/apparmor/.gitignore

@@ -1,6 +1,5 @@
 #
 # Generated include files
 #
-af_names.h
 capability_names.h
 rlim_names.h