Remove unused GroupLink struct and file from engine

engine/groups.go

@@ -1,46 +0,0 @@
-/*
-Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
-Copyright (C) ITsysCOM GmbH
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>
-*/
-
-package engine
-
-import (
-	"sort"
-)
-
-type GroupLink struct {
-	Id     string
-	Weight float64
-}
-
-type GroupLinks []*GroupLink
-
-func (gls GroupLinks) Len() int {
-	return len(gls)
-}
-
-func (gls GroupLinks) Swap(i, j int) {
-	gls[i], gls[j] = gls[j], gls[i]
-}
-
-func (gls GroupLinks) Less(j, i int) bool {
-	return gls[i].Weight < gls[j].Weight
-}
-
-func (gls GroupLinks) Sort() {
-	sort.Sort(gls)
-}