cifs: remove the vers= and version= synonyms for ver=

We want these to mean something different entirely, and the mount.cifs
helper only ever passed in ver= automatically. Also, don't allow
ver=cifs anymore since that was never passed in by the mount helper.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c49d494..4a6baa8 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -210,8 +210,6 @@
 	{ Opt_netbiosname, "netbiosname=%s" },
 	{ Opt_servern, "servern=%s" },
 	{ Opt_ver, "ver=%s" },
-	{ Opt_ver, "vers=%s" },
-	{ Opt_ver, "version=%s" },
 	{ Opt_sec, "sec=%s" },
 	{ Opt_cache, "cache=%s" },
 
@@ -1874,8 +1872,7 @@
 			if (string == NULL)
 				goto out_nomem;
 
-			if (strnicmp(string, "cifs", 4) == 0 ||
-			    strnicmp(string, "1", 1) == 0) {
+			if (strnicmp(string, "1", 1) == 0) {
 				/* This is the default */
 				break;
 			}