mount: remove inlude/nospec.h include

It's not needed, so remove it.

Link: https://lore.kernel.org/r/20241213-work-mount-rbtree-lockless-v3-1-6e3cdaf9b280@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: brauner

fs/namespace.c

@@ -32,7 +32,6 @@
 #include <linux/fs_context.h>
 #include <linux/shmem_fs.h>
 #include <linux/mnt_idmapping.h>
-#include <linux/nospec.h>
 
 #include "pnode.h"
 #include "internal.h"