cifs: remove legacy MultiuserMount option

We've now warned about this for two releases. Remove it for 3.5.

Signed-off-by: Jeff Layton <jlayton@redhat.com>

fs/cifs/cifsfs.c

@@ -56,7 +56,6 @@ int traceSMB = 0;
 bool enable_oplocks = true;
 unsigned int linuxExtEnabled = 1;
 unsigned int lookupCacheEnabled = 1;
-unsigned int multiuser_mount = 0;
 unsigned int global_secflags = CIFSSEC_DEF;
 /* unsigned int ntlmv2_support = 0; */
 unsigned int sign_CIFS_PDUs = 1;