fix cannot remove registration without gh url (#185)

Author: ChristopherHX

runnerconfiguration/common.go

@@ -96,7 +96,7 @@ type RunnerSettings struct {
 }
 
 func gitHubAuth(config *ConfigureRemoveRunner, c *http.Client, runnerEvent string, apiEndpoint string, survey Survey) (*protocol.GitHubAuthResult, error) {
-	if config.URL == "" {
+	if config.URL == "" && !config.Unattended {
 		config.URL = survey.GetInput("Which GitHub Url is assosiated with this runner (Normally this isn't missing):", "")
 	}
 	registerUrl, err := url.Parse(config.URL)

runnerconfiguration/remove.go

@@ -56,7 +56,9 @@ func (config *RemoveRunner) Remove(settings *RunnerSettings, survey Survey, auth
 	for i, instance := range instancesToRemove {
 		result := func() error {
 			confremove := *config
-			confremove.URL = instance.RegistrationURL
+			if instance.RegistrationURL != "" {
+				confremove.URL = instance.RegistrationURL
+			}
 			res := auth
 			if needsPat {
 				// Enshure that gitHubAuth always uses the Personal access token