netdevsim: remove max_vfs dentry

Commit d3953819 ("netdevsim: Add max_vfs to bus_dev")
added this file and saved the dentry for no apparent reason.

Link: https://lore.kernel.org/r/20211028211753.22612-1-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/netdevsim/dev.c

@@ -259,11 +259,9 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 	debugfs_create_bool("fail_trap_policer_counter_get", 0600,
 			    nsim_dev->ddir,
 			    &nsim_dev->fail_trap_policer_counter_get);
-	nsim_dev->max_vfs = debugfs_create_file("max_vfs",
-						0600,
-						nsim_dev->ddir,
-						nsim_dev->nsim_bus_dev,
-						&nsim_dev_max_vfs_fops);
+	debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
+			    nsim_dev->nsim_bus_dev, &nsim_dev_max_vfs_fops);
+
 	nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
 	if (IS_ERR(nsim_dev->nodes_ddir)) {
 		err = PTR_ERR(nsim_dev->nodes_ddir);

drivers/net/netdevsim/netdevsim.h

@@ -224,7 +224,6 @@ struct nsim_dev {
 	struct dentry *ddir;
 	struct dentry *ports_ddir;
 	struct dentry *take_snapshot;
-	struct dentry *max_vfs;
 	struct dentry *nodes_ddir;
 	struct bpf_offload_dev *bpf_dev;
 	bool bpf_bind_accept;