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, 138 deletions

diff --git a/models/migrations/v64.go b/models/migrations/v64.go
deleted file mode 100644
index 623cceddbc..0000000000
--- a/models/migrations/v64.go
+++ /dev/null
@@ -1,138 +0,0 @@
-// Copyright 2018 The Gitea 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 (
-	"code.gitea.io/gitea/modules/timeutil"
-
-	"xorm.io/xorm"
-)
-
-func addMultipleAssignees(x *xorm.Engine) error {
-
-	// Redeclare issue struct
-	type Issue struct {
-		ID          int64  `xorm:"pk autoincr"`
-		RepoID      int64  `xorm:"INDEX UNIQUE(repo_index)"`
-		Index       int64  `xorm:"UNIQUE(repo_index)"` // Index in one repository.
-		PosterID    int64  `xorm:"INDEX"`
-		Title       string `xorm:"name"`
-		Content     string `xorm:"TEXT"`
-		MilestoneID int64  `xorm:"INDEX"`
-		Priority    int
-		AssigneeID  int64 `xorm:"INDEX"`
-		IsClosed    bool  `xorm:"INDEX"`
-		IsPull      bool  `xorm:"INDEX"` // Indicates whether is a pull request or not.
-		NumComments int
-
-		DeadlineUnix timeutil.TimeStamp `xorm:"INDEX"`
-		CreatedUnix  timeutil.TimeStamp `xorm:"INDEX created"`
-		UpdatedUnix  timeutil.TimeStamp `xorm:"INDEX updated"`
-		ClosedUnix   timeutil.TimeStamp `xorm:"INDEX"`
-	}
-
-	// Updated the comment table
-	type Comment struct {
-		ID              int64 `xorm:"pk autoincr"`
-		Type            int
-		PosterID        int64 `xorm:"INDEX"`
-		IssueID         int64 `xorm:"INDEX"`
-		LabelID         int64
-		OldMilestoneID  int64
-		MilestoneID     int64
-		OldAssigneeID   int64
-		AssigneeID      int64
-		RemovedAssignee bool
-		OldTitle        string
-		NewTitle        string
-
-		CommitID        int64
-		Line            int64
-		Content         string `xorm:"TEXT"`
-		RenderedContent string `xorm:"-"`
-
-		CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
-		UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
-
-		// Reference issue in commit message
-		CommitSHA string `xorm:"VARCHAR(40)"`
-	}
-
-	// Create the table
-	type IssueAssignees struct {
-		ID         int64 `xorm:"pk autoincr"`
-		AssigneeID int64 `xorm:"INDEX"`
-		IssueID    int64 `xorm:"INDEX"`
-	}
-
-	if err := x.Sync2(IssueAssignees{}); err != nil {
-		return err
-	}
-
-	if err := x.Sync2(Comment{}); err != nil {
-		return err
-	}
-
-	// Range over all issues and insert a new entry for each issue/assignee
-	sess := x.NewSession()
-	defer sess.Close()
-
-	if err := sess.Begin(); err != nil {
-		return err
-	}
-
-	allIssues := []*Issue{}
-	if err := sess.Find(&allIssues); err != nil {
-		return err
-	}
-
-	for _, issue := range allIssues {
-		if issue.AssigneeID != 0 {
-			_, err := sess.Insert(IssueAssignees{IssueID: issue.ID, AssigneeID: issue.AssigneeID})
-			if err != nil {
-				sess.Rollback()
-				return err
-			}
-		}
-	}
-
-	// Migrate comments
-	// First update everything to not have nulls in db
-	if _, err := sess.Where("type = ?", 9).Cols("removed_assignee").Update(Comment{RemovedAssignee: false}); err != nil {
-		return err
-	}
-
-	allAssignementComments := []*Comment{}
-	if err := sess.Where("type = ?", 9).Find(&allAssignementComments); err != nil {
-		return err
-	}
-
-	for _, comment := range allAssignementComments {
-		// Everytime where OldAssigneeID is > 0, the assignement was removed.
-		if comment.OldAssigneeID > 0 {
-			_, err := sess.ID(comment.ID).Update(Comment{RemovedAssignee: true})
-			if err != nil {
-				return err
-			}
-		}
-	}
-
-	// Commit and begin new transaction for dropping columns
-	if err := sess.Commit(); err != nil {
-		return err
-	}
-	if err := sess.Begin(); err != nil {
-		return err
-	}
-
-	if err := dropTableColumns(sess, "issue", "assignee_id"); err != nil {
-		return err
-	}
-
-	if err := dropTableColumns(sess, "issue_user", "is_assigned"); err != nil {
-		return err
-	}
-	return sess.Commit()
-}