qemu: monitor: Drop fallback to text monitor for 'send-key' command

The QMP version was added in qemu commit e4c8f004c55d9da3eae3e14 which
is included in v1.3.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_monitor_json.c

@@ -4525,14 +4525,8 @@ int qemuMonitorJSONSendKey(qemuMonitorPtr mon,
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
         goto cleanup;
 
-    if (qemuMonitorJSONHasError(reply, "CommandNotFound")) {
-        VIR_DEBUG("send-key command not found, trying HMP");
-        if (qemuMonitorTextSendKey(mon, holdtime, keycodes, nkeycodes) < 0)
-            goto cleanup;
-    } else {
     if (qemuMonitorJSONCheckError(cmd, reply) < 0)
         goto cleanup;
-    }
 
     ret = 0;
  cleanup: