module: Remove outdated comment

Since commit e513cc1c ("module: Remove stop_machine from module
unloading") this comment is no longer correct. Remove it.
Signed-off-by: Yu Chen <chen.yu@easystack.cn>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

kernel/module.c

@@ -958,7 +958,6 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
 		}
 	}
 
-	/* Stop the machine so refcounts can't move and disable module. */
 	ret = try_stop_module(mod, flags, &forced);
 	if (ret != 0)
 		goto out;