fix(scalesets): remove debug print leaking auth token to stdout

ListRunnerScaleSets dumped the raw outgoing HTTP request via
httputil.DumpRequest + fmt.Println, which wrote the
"Authorization: Bearer <token>" header to stdout. Remove the debug
block and the now-unused net/http/httputil import.

Author: cbartz

util/github/scalesets/scalesets.go

@@ -20,7 +20,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
-	"net/http/httputil"
 
 	runnerErrors "github.com/cloudbase/garm-provider-common/errors"
 	"github.com/cloudbase/garm/params"
@@ -109,10 +108,6 @@ func (s *ScaleSetClient) ListRunnerScaleSets(ctx context.Context) (_ *params.Run
 	if err != nil {
 		return nil, err
 	}
-	data, err := httputil.DumpRequest(req, false)
-	if err == nil {
-		fmt.Println(string(data))
-	}
 	resp, err := s.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("failed to list runner scale sets: %w", err)