Update linter for golang v1.25 compatibility

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/version/main.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 
 	"github.com/spf13/cobra"
-	"github.com/warewulf/warewulf/internal/pkg/api/routes/wwapiv1"
 	"github.com/warewulf/warewulf/internal/pkg/version"
 )
 
@@ -12,7 +11,7 @@ func CobraRunE(cmd *cobra.Command, args []string) error {
 
 	fmt.Println("wwctl version:\t", version.GetVersion())
 
-	var wwVersionResponse *wwapiv1.VersionResponse = version.Version()
+	wwVersionResponse := version.Version()
 	fmt.Println("rpc version:", wwVersionResponse.String())
 	return nil
 }