utils: Drop unused Remove* utils functions

Imported from Icinga/icinga-notifications@aa3b0db

Author: yhabteab

utils/utils.go

@@ -166,25 +166,6 @@ func PrintErrorThenExit(err error, exitCode int) {
 	os.Exit(exitCode)
 }
 
-func RemoveIf[T any](slice []T, pred func(T) bool) []T {
-	n := len(slice)
-
-	for i := 0; i < n; i++ {
-		for i < n && pred(slice[i]) {
-			n--
-			slice[i], slice[n] = slice[n], slice[i]
-		}
-	}
-
-	return slice[:n]
-}
-
-func RemoveNils[T any](slice []*T) []*T {
-	return RemoveIf(slice, func(ptr *T) bool {
-		return ptr == nil
-	})
-}
-
 // IterateOrderedMap implements iter.Seq2 to iterate over a map in the key's order.
 //
 // This function returns a func yielding key-value-pairs from a given map in the order of their keys, if their type

utils/utils_test.go

@@ -54,28 +54,6 @@ func requireClosedEmpty(t *testing.T, ch <-chan int) {
 	}
 }
 
-func TestRemoveNils(t *testing.T) {
-	var a, b, c, d int
-
-	tests := []struct {
-		name string
-		in   []*int
-		want []*int
-	}{
-		{"Empty", []*int{}, []*int{}},
-		{"SingleKeep", []*int{&a}, []*int{&a}},
-		{"SingleRemove", []*int{nil}, []*int{}},
-		{"KeepOrder", []*int{&a, &b, &c, &d}, []*int{&a, &b, &c, &d}},
-		{"Duplicates", []*int{&a, &b, &b}, []*int{&a, &b, &b}},
-		{"Mixed", []*int{&a, nil, &b, nil, nil, &b, nil, &d}, []*int{&a, &b, &b, &d}},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			assert.Equal(t, tt.want, RemoveNils(tt.in))
-		})
-	}
-}
-
 func TestIterateOrderedMap(t *testing.T) {
 	tests := []struct {
 		name    string