fix(code): remove code that is no longer necessary EE-6078 (#10256)

api/exec/common.go

@@ -3,48 +3,3 @@ package exec
 import "regexp"
 
 var stackNameNormalizeRegex = regexp.MustCompile("[^-_a-z0-9]+")
-
-type StringSet map[string]bool
-
-func NewStringSet() StringSet {
-	return make(StringSet)
-}
-
-func (s StringSet) Add(x string) {
-	s[x] = true
-}
-
-func (s StringSet) Remove(x string) {
-	if s.Contains(x) {
-		delete(s, x)
-	}
-}
-
-func (s StringSet) Contains(x string) bool {
-	_, ok := s[x]
-	return ok
-}
-
-func (s StringSet) Len() int {
-	return len(s)
-}
-
-func (s StringSet) List() []string {
-	list := make([]string, s.Len())
-
-	i := 0
-	for k := range s {
-		list[i] = k
-		i++
-	}
-
-	return list
-}
-
-func (s StringSet) Union(x StringSet) {
-	if x.Len() != 0 {
-		for k := range x {
-			s.Add(k)
-		}
-	}
-}