feat(abs): add igfx_user_feature to the graphics abs.

apparmor.d/groups/browsers/firefox

@@ -115,7 +115,6 @@ profile firefox @{exec_path} flags=(attach_disconnected) {
   /etc/@{name}/{,**} r,
   /etc/cups/client.conf r,
   /etc/fstab r,
-  /etc/igfx_user_feature{,_next}.txt w,
   /etc/mailcap r,
   /etc/mime.types r,
   /etc/opensc.conf r,

apparmor.d/groups/browsers/firefox-vaapitest

@@ -19,8 +19,6 @@ profile firefox-vaapitest @{exec_path} flags=(attach_disconnected) {
 
   @{exec_path} mr,
 
-  /etc/igfx_user_feature{,_next}.txt w,
-
   owner /tmp/@{name}/.parentlock rw,
 
   deny @{config_dirs}/firefox/*/.parentlock rw,