fix(hyper): render error messages from back-end (#3513)

* Superseeds #3508

Author: andreynering

internal/agent/agent.go

@@ -1160,10 +1160,6 @@ func (a *sessionAgent) Run(ctx context.Context, call SessionAgentCall) (result *
 			currentAssistant.AddFinish(message.FinishReasonCanceled, "User canceled request", "")
 		} else if isHyper && errors.As(err, &providerErr) && providerErr.StatusCode == http.StatusUnauthorized {
 			currentAssistant.AddFinish(message.FinishReasonError, "Unauthorized", `Please re-authenticate with Hyper. You can also run "crush auth" to re-authenticate.`)
-		} else if isHyper && errors.As(err, &providerErr) && providerErr.StatusCode == http.StatusPaymentRequired {
-			url := hyper.BaseURL()
-			link := linkStyle.Hyperlink(url, "id=hyper").Render(url)
-			currentAssistant.AddFinish(message.FinishReasonError, "No credits", "You're out of credits. Add more at "+link)
 		} else if errors.As(err, &providerErr) {
 			if providerErr.Message == "The requested model is not supported." {
 				url := "https://github.com/settings/copilot/features"