Windows: remove unused label in ntops.c

The label 'retry' in nt_open is not used and was causing a warning.  Remove it.

Change-Id: I964d954e4f9cdb672c689a6e757a5f62bea8f65c
Reviewed-on: http://gerrit.openafs.org/3747
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>

src/vol/ntops.c

@@ -119,7 +119,6 @@ nt_open(char *name, int flags, int mode)
 	break;
     }
 
-  retry:
     fh = CreateFile(name, nt_access, nt_share, NULL, nt_create, FandA, NULL);
     if (fh == INVALID_HANDLE_VALUE) {
         DWORD gle = GetLastError();