Remove migration support from versions earlier than 1.6.0 (#10026)

* Remove migration support from versions earlier than 1.6.0

* Remove unused functions

* Update gogs upgrade instructions

* Improve "latest" link as per @jolheiser

Co-authored-by: Antoine GIRARD <sapk@users.noreply.github.com>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

1 files changed, 0 insertions, 52 deletions

diff --git a/models/migrations/v13.go b/models/migrations/v13.go
deleted file mode 100644
index 3c35b66ab9..0000000000
--- a/models/migrations/v13.go
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2016 The Gogs Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package migrations
-
-import (
-	"encoding/json"
-	"fmt"
-	"strings"
-
-	"github.com/unknwon/com"
-	"xorm.io/xorm"
-)
-
-func ldapUseSSLToSecurityProtocol(x *xorm.Engine) error {
-	results, err := x.Query("SELECT `id`,`cfg` FROM `login_source` WHERE `type` = 2 OR `type` = 5")
-	if err != nil {
-		if strings.Contains(err.Error(), "no such column") {
-			return nil
-		}
-		return fmt.Errorf("select LDAP login sources: %v", err)
-	}
-
-	sess := x.NewSession()
-	defer sess.Close()
-	if err = sess.Begin(); err != nil {
-		return err
-	}
-
-	for _, result := range results {
-		cfg := map[string]interface{}{}
-		if err = json.Unmarshal(result["cfg"], &cfg); err != nil {
-			return fmt.Errorf("decode JSON config: %v", err)
-		}
-		if com.ToStr(cfg["UseSSL"]) == "true" {
-			cfg["SecurityProtocol"] = 1 // LDAPS
-		}
-		delete(cfg, "UseSSL")
-
-		data, err := json.Marshal(&cfg)
-		if err != nil {
-			return fmt.Errorf("encode JSON config: %v", err)
-		}
-
-		if _, err = sess.Exec("UPDATE `login_source` SET `cfg`=? WHERE `id`=?",
-			string(data), com.StrTo(result["id"]).MustInt64()); err != nil {
-			return fmt.Errorf("update config column: %v", err)
-		}
-	}
-	return sess.Commit()
-}