climc: remove stale zsh completion code

cmd/climc/promputils/complete_zsh.go

@@ -128,11 +128,13 @@ func zshCompGenFlagEntryExtras(f structarg.Argument) string {
 	// allow options for flag
 	extras := ":"
 
-	switch arg := f.(type) {
-	case *structarg.SingleArgument:
+	type iChoices interface {
+		Choices() []string
+	}
+	if hasChoices, ok := f.(iChoices); ok {
 		// process choices
 		var words []string
-		for _, w := range arg.Choices() {
+		for _, w := range hasChoices.Choices() {
 			words = append(words, fmt.Sprintf("%q", w))
 		}
 		if len(words) != 0 {

cmd/climc/promputils/completescript.go

@@ -75,33 +75,3 @@ _climc(){
     do
         line="${arr[$i]}"
         allopts[count]=${line%s`
-
-const ZSH_COMPLETE_SCRIPT_2 = `%"#"*}
-        subopts[count]=${line#*"#"}
-        ((count++))
-    done
-    _arguments \
-            '1: :->commands'\
-            '*: :->options'
-
-    case $state in 
-        commands)
-        _arguments '1:Comm:(${allopts[*]})'
-        ;;
-        *)
-            item=1
-            for key in ${allopts[*]}
-            do
-                case $words[2] in
-                    $key)
-                    compadd "$@"` + "`echo $subopts[item]`" + `
-                    ;;
-                    *)
-                    ;;
-                esac
-                ((item++))
-            done
-    esac    
-}
-_climc "$@"
-`