Replace SortedStringKeys with SortedKeys

Now that we have generics.

Bug: 193460475
Test: presubmits
Change-Id: I1594fd8feb505175d5c09c03ef397e5ffd5b09cb

android/soongconfig/modules.go

@@ -301,23 +301,6 @@ func (defs *Bp2BuildSoongConfigDefinitions) AddVars(mtDef SoongConfigDefinition)
 	}
 }
 
-// This is a copy of the one available in soong/android/util.go, but depending
-// on the android package causes a cyclic dependency. A refactoring here is to
-// extract common utils out from android/utils.go for other packages like this.
-func sortedStringKeys(m interface{}) []string {
-	v := reflect.ValueOf(m)
-	if v.Kind() != reflect.Map {
-		panic(fmt.Sprintf("%#v is not a map", m))
-	}
-	keys := v.MapKeys()
-	s := make([]string, 0, len(keys))
-	for _, key := range keys {
-		s = append(s, key.String())
-	}
-	sort.Strings(s)
-	return s
-}
-
 // String emits the Soong config variable definitions as Starlark dictionaries.
 func (defs Bp2BuildSoongConfigDefinitions) String() string {
 	ret := ""