Used dialect for postgres

pkg/services/sqlstore/user.go

@@ -319,15 +319,10 @@ func SearchUsers(query *m.SearchUsersQuery) error {
 
 func DeleteUser(cmd *m.DeleteUserCommand) error {
 	return inTransaction(func(sess *xorm.Session) error {
-    var deletes [2]string
-
-    if (sess.Engine.DriverName() == "postgres") {
-      deletes[0] = "DELETE FROM star WHERE user_id = ?"
-      deletes[1] = "DELETE FROM \"user\" WHERE id = ?"
-    } else {
-      deletes[0] = "DELETE FROM star WHERE user_id = ?"
-      deletes[1] = "DELETE FROM user WHERE id = ?"
-    }
+		deletes := []string{
+			"DELETE FROM star WHERE user_id = ?",
+			"DELETE FROM " + dialect.Quote("user") + " WHERE id = ?",
+		}
 
 		for _, sql := range deletes {
 			_, err := sess.Exec(sql, cmd.UserId)