[CHORE] Drop `go-git` support

See https://codeberg.org/forgejo/discussions/issues/164 for the
rationale and discussion of this change.

Everything related to the `go-git` dependency is dropped (Only a single
instance is left in a test file to test for an XSS, it requires crafting
an commit that Git itself refuses to craft). `_gogit` files have
been removed entirely, `go:build: !gogit` is removed, `XXX_nogogit.go` files
either have been renamed or had their code being merged into the
`XXX.go` file.

1 files changed, 0 insertions, 54 deletions

diff --git a/modules/git/last_commit_cache_nogogit.go b/modules/git/last_commit_cache_nogogit.go
deleted file mode 100644
index 155cb3cb7c..0000000000
--- a/modules/git/last_commit_cache_nogogit.go
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2020 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-//go:build !gogit
-
-package git
-
-import (
-	"context"
-)
-
-// CacheCommit will cache the commit from the gitRepository
-func (c *Commit) CacheCommit(ctx context.Context) error {
-	if c.repo.LastCommitCache == nil {
-		return nil
-	}
-	return c.recursiveCache(ctx, &c.Tree, "", 1)
-}
-
-func (c *Commit) recursiveCache(ctx context.Context, tree *Tree, treePath string, level int) error {
-	if level == 0 {
-		return nil
-	}
-
-	entries, err := tree.ListEntries()
-	if err != nil {
-		return err
-	}
-
-	entryPaths := make([]string, len(entries))
-	for i, entry := range entries {
-		entryPaths[i] = entry.Name()
-	}
-
-	_, err = WalkGitLog(ctx, c.repo, c, treePath, entryPaths...)
-	if err != nil {
-		return err
-	}
-
-	for _, treeEntry := range entries {
-		// entryMap won't contain "" therefore skip this.
-		if treeEntry.IsDir() {
-			subTree, err := tree.SubTree(treeEntry.Name())
-			if err != nil {
-				return err
-			}
-			if err := c.recursiveCache(ctx, subTree, treeEntry.Name(), level-1); err != nil {
-				return err
-			}
-		}
-	}
-
-	return nil
-}