proc: remove MODULE_LICENSE

proc is not modular, so MODULE_LICENSE just expands to empty space.  proc
without doubts remains GPLed.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/inode.c

@@ -467,4 +467,3 @@ int proc_fill_super(struct super_block *s)
 	de_put(&proc_root);
 	return -ENOMEM;
 }
-MODULE_LICENSE("GPL");