get rid of named match groups

day-03/internal/util/util.go

@@ -1,21 +1,9 @@
 package util
 
 import (
-	"regexp"
 	"strconv"
 )
 
-func GetGroups(r *regexp.Regexp, s string) map[string]string {
-	groups := make(map[string]string)
-	names := r.SubexpNames()
-	for i, res := range r.FindStringSubmatch(s) {
-		if i != 0 {
-			groups[names[i]] = res
-		}
-	}
-	return groups
-}
-
 func MustConv(s string) int {
 	n, err := strconv.Atoi(s)
 	if err != nil {