Update common.go

Author: BupycHuk

exporter/common.go

@@ -167,11 +167,6 @@ func listAllCollections(ctx context.Context, client *mongo.Client, filterInNames
 		filterNS = append(filterNS, dbs...)
 	}
 
-	for _, db := range dbs {
-		for _, namespace := range filterNS {
-			parts := strings.Split(namespace, ".")
-			dbname := strings.TrimSpace(parts[0])
-
 
 	for _, db := range dbs {
 		for _, namespace := range filterNS {