capabilities: remove cap_mmap_file()

The cap_mmap_file() LSM callback returns the default value for the
security_mmap_file() LSM hook and can be safely removed.

Signed-off-by: Paul Moore <[e-mail]>
Reviewed-by: Casey Schaufler <[e-mail]>
Reviewed-by: Serge Hallyn <[e-mail]>
Signed-off-by: Serge Hallyn <[e-mail]>

security/commoncap.c

···
 	return ret;
 }
 
-int cap_mmap_file(struct file *file, unsigned long reqprot,
-		  unsigned long prot, unsigned long flags)
-{
-	return 0;
-}
-
 #ifdef CONFIG_SECURITY
 
 static const struct lsm_id capability_lsmid = {
···
 	LSM_HOOK_INIT(inode_killpriv, cap_inode_killpriv),
 	LSM_HOOK_INIT(inode_getsecurity, cap_inode_getsecurity),
 	LSM_HOOK_INIT(mmap_addr, cap_mmap_addr),
-	LSM_HOOK_INIT(mmap_file, cap_mmap_file),
 	LSM_HOOK_INIT(task_fix_setuid, cap_task_fix_setuid),
 	LSM_HOOK_INIT(task_prctl, cap_task_prctl),
 	LSM_HOOK_INIT(task_setscheduler, cap_task_setscheduler),