Use xorm quoter for feed query (#5018)

server/store/datastore/feed.go

@@ -41,7 +41,7 @@ pipelines.author as pipeline_author,
 pipelines.email as pipeline_email,
 pipelines.avatar as pipeline_avatar`
 
-	return fmt.Sprintf(feedTemplate, s.quoteIdentifier("commit"))
+	return fmt.Sprintf(feedTemplate, s.engine.Dialect().Quoter().Quote("commit"))
 }
 
 func (s storage) GetPipelineQueue() ([]*model.Feed, error) {

server/store/datastore/helper.go

@@ -76,15 +76,3 @@ func callerName(skip int) string {
 	}
 	return fnName
 }
-
-func (s storage) quoteIdentifier(identifier string) string {
-	driver := s.engine.DriverName()
-	switch driver {
-	case DriverMysql:
-		return "`" + identifier + "`"
-	case DriverPostgres, DriverSqlite:
-		return "\"" + identifier + "\""
-	default:
-		return identifier
-	}
-}