Remove the unused method

Signed-off-by: JmPotato <[email protected]>

client/http/types.go

@@ -74,25 +74,6 @@ type RegionsInfo struct {
 	Regions []RegionInfo `json:"regions"`
 }
 
-// Merge merges two RegionsInfo together and returns a new one.
-func (ri *RegionsInfo) Merge(other *RegionsInfo) *RegionsInfo {
-	newRegionsInfo := &RegionsInfo{
-		Regions: make([]RegionInfo, 0, ri.Count+other.Count),
-	}
-	m := make(map[int64]RegionInfo, ri.Count+other.Count)
-	for _, region := range ri.Regions {
-		m[region.ID] = region
-	}
-	for _, region := range other.Regions {
-		m[region.ID] = region
-	}
-	for _, region := range m {
-		newRegionsInfo.Regions = append(newRegionsInfo.Regions, region)
-	}
-	newRegionsInfo.Count = int64(len(newRegionsInfo.Regions))
-	return newRegionsInfo
-}
-
 // StoreHotPeersInfos is used to get human-readable description for hot regions.
 type StoreHotPeersInfos struct {
 	AsPeer   StoreHotPeersStat `json:"as_peer"`