rbd: Drop deprecated -drive parameter "filename"

Parameter "filename" is deprecated since commit 91589d9e5ca, v2.10.0.
Time to get rid of it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block/rbd.c b/block/rbd.c
index a16431e..40c6e41 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -632,25 +632,9 @@
     QObject *crumpled = NULL;
     const QDictEntry *e;
     Error *local_err = NULL;
-    const char *filename;
     char *keypairs, *secretid;
     int r;
 
-    /* If we are given a filename, parse the filename, with precedence given to
-     * filename encoded options */
-    filename = qdict_get_try_str(options, "filename");
-    if (filename) {
-        warn_report("'filename' option specified. "
-                    "This is an unsupported option, and may be deprecated "
-                    "in the future");
-        qemu_rbd_parse_filename(filename, options, &local_err);
-        qdict_del(options, "filename");
-        if (local_err) {
-            error_propagate(errp, local_err);
-            return -EINVAL;
-        }
-    }
-
     keypairs = g_strdup(qdict_get_try_str(options, "=keyvalue-pairs"));
     if (keypairs) {
         qdict_del(options, "=keyvalue-pairs");