Switch kubectl resource completion to discovery

pkg/kubectl/cmd/delete.go

@@ -115,7 +115,6 @@ type DeleteOptions struct {
 
 func NewCmdDelete(f cmdutil.Factory, out, errOut io.Writer) *cobra.Command {
 	deleteFlags := NewDeleteCommandFlags("containing the resource to delete.")
-	validArgs := cmdutil.ValidArgList(f)
 
 	cmd := &cobra.Command{
 		Use: "delete ([-f FILENAME] | TYPE [(NAME | -l label | --all)])",
@@ -138,8 +137,6 @@ func NewCmdDelete(f cmdutil.Factory, out, errOut io.Writer) *cobra.Command {
 			}
 		},
 		SuggestFor: []string{"rm"},
-		ValidArgs:  validArgs,
-		ArgAliases: kubectl.ResourceAliases(validArgs),
 	}
 
 	deleteFlags.AddFlags(cmd)