update todo, delete uneccessary body http respons

database.go

@@ -125,6 +125,15 @@ func DbSaveGroupWithoutClients(ctx context.Context, group *Group) error {
 	return err
 }
 
+// DbDeleteGroup deletes given group by id
+// return: error if not successful
+func DbDeleteGroup(ctx context.Context, group *Group) error {
+	_, err := dbConn.Exec(ctx, `
+		DELETE FROM chat_groups WHERE id = $1
+	`, group.Id)
+	return err
+}
+
 // DbSetGroupByIdWithoutClients sets all fields of given struct with database's data using id, populates Clients map with member ids but not their data
 // return: error if not successful
 func DbSetGroupByIdWithoutClients(ctx context.Context, group *Group) error {