clean useless code

Author: jotak

pkg/model/filters/filters.go

@@ -84,7 +84,6 @@ func (m MultiQueries) Distribute(toDistribute []SingleQuery, ignorePred func(Sin
 func (m *Match) ToLabelFilter() (LabelFilter, bool) {
 	values := strings.Split(m.Values, ",")
 	if len(values) == 1 && isExactMatch(values[0]) {
-		// namespace must be exact match
 		if m.Not {
 			return NotStringLabelFilter(m.Key, trimExactMatch(values[0])), true
 		} else if m.MoreThanOrEqual {

pkg/prometheus/query.go

@@ -145,10 +145,6 @@ func appendFilteredMetric(sb *strings.Builder, metric string, filters filters.Si
 	sb.WriteRune('{')
 	first := true
 	for _, filter := range filters {
-		// namespace filtering is managed by prom label proxy so we can simply skip it
-		if filter.Key == "namespace" {
-			continue
-		}
 		if lf, ok := filter.ToLabelFilter(); ok {
 			if !first {
 				sb.WriteRune(',')