Fix desktop to support this

desktop/src/configuration.tsx

@@ -36,7 +36,6 @@ interface RqbitDesktopConfigUpnp {
   disable: boolean;
 
   enable_server: boolean;
-  server_hostname: string;
   server_friendly_name: string;
 }
 

desktop/src/configure.tsx

@@ -293,16 +293,6 @@ export const ConfigModal: React.FC<{
               help="If enabled, rqbit will advertise the media to supported LAN devices, e.g. TVs."
             />
 
-            <FormInput
-              inputType="text"
-              label="[Required] Hostname"
-              name="upnp.server_hostname"
-              value={config.upnp.server_hostname}
-              disabled={!config.upnp.enable_server}
-              onChange={handleInputChange}
-              help="Set this to your LAN IP or hostname resolvable from LAN."
-            />
-
             <FormInput
               inputType="text"
               label="Friendly name"