fix linter issues

Author: GokceGK

internal/cmd/beta/server/create/create.go

@@ -85,7 +85,7 @@ func NewCmd(p *print.Printer) *cobra.Command {
 				`$ stackit beta server create --machine-type t1.1 --name server1 --boot-volume-source-id xxx --boot-volume-source-type image --boot-volume-size 64`,
 			),
 		),
-		RunE: func(cmd *cobra.Command, args []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) error {
 			ctx := context.Background()
 			model, err := parseInput(p, cmd)
 			if err != nil {

internal/cmd/beta/server/list/list.go

@@ -55,7 +55,7 @@ func NewCmd(p *print.Printer) *cobra.Command {
 				"$ stackit beta server list --limit 10",
 			),
 		),
-		RunE: func(cmd *cobra.Command, args []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) error {
 			ctx := context.Background()
 			model, err := parseInput(p, cmd)
 			if err != nil {