security: remove duplicated include from security.h

Remove duplicated include.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: James Morris <jmorris@namei.org>

include/linux/security.h

@@ -30,7 +30,6 @@
 #include <linux/err.h>
 #include <linux/string.h>
 #include <linux/mm.h>
-#include <linux/fs.h>
 
 struct linux_binprm;
 struct cred;