Remove wwctl overlay build --host #1419

Remove the ability to "build" the host overlay with `wwctl overlay
build`. This also obsoletes the `--nodes` flag, which is also removed.

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

internal/app/wwctl/overlay/build/root.go

@@ -29,15 +29,11 @@ var (
 			return node_names, cobra.ShellCompDirectiveNoFileComp
 		},
 	}
-	BuildHost    bool
-	BuildNodes   bool
 	OverlayNames []string
 	OverlayDir   string
 )
 
 func init() {
-	baseCmd.PersistentFlags().BoolVarP(&BuildHost, "host", "H", false, "Build overlays only for the host")
-	baseCmd.PersistentFlags().BoolVarP(&BuildNodes, "nodes", "N", false, "Build overlays only for the nodes")
 	baseCmd.PersistentFlags().StringSliceVarP(&OverlayNames, "overlay", "O", []string{}, "Build only specific overlay(s)")
 
 	if err := baseCmd.RegisterFlagCompletionFunc("overlay", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
@@ -46,7 +42,7 @@ func init() {
 	}); err != nil {
 		log.Println(err)
 	}
-	baseCmd.PersistentFlags().StringVarP(&OverlayDir, "output", "o", "", `Do not create an overlay image, for distribution but write to
+	baseCmd.PersistentFlags().StringVarP(&OverlayDir, "output", "o", "", `Do not create an overlay image for distribution but write to
 	the given directory. An overlay must also be ge given to use this option.`)
 
 }