ext2: remove duplicate 'ext2_get_acl()' define

When commit 4e34e719e457 ("fs: take the ACL checks to common code")
changed the xyz_check_acl() functions into the more natural
xyz_get_acl() interface, we grew two copies of the

#define ext2_get_acl NULL

define for the non-acl case.

Remove the extra one.

Reported-by: Marco Stornelli <[e-mail]>
Cc: Christoph Hellwig <[e-mail]>
Cc: Al Viro <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/ext2/acl.h

···
 #else
 #include <linux/sched.h>
 #define ext2_get_acl	NULL
-#define ext2_get_acl	NULL
 #define ext2_set_acl	NULL
 
 static inline int