docs: Stop mentioning libgit2

We don't use either Git2go nor libgit2 anymore, so let's stop mentioning
it.

7 files changed, 8 insertions, 12 deletions

diff --git a/README.md b/README.md
index 80f0f72ff..6416eb825 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,6 @@ graph LR
 
   subgraph "Gitaly Service"
   Gitaly == git ==> Filesystem
-  Gitaly -- "libgit2" --> Filesystem[(Filesystem)]
   end
 
   subgraph "Clients"
@@ -73,9 +72,8 @@ In [High Availability](#high-availability) mode, the current implementation look
 ```mermaid
 graph LR
 
-  subgraph "Gitaly Nodes"                                                
+  subgraph "Gitaly Nodes"
   Gitaly == git ==> Filesystem
-  Gitaly -- "libgit2" --> Filesystem[(Filesystem)]
   end
 
   subgraph "Praefects"
@@ -89,10 +87,10 @@ graph LR
 
   subgraph "Clients"
     Rails[gitlab-rails]
-    Workhorse 
+    Workhorse
     Shell[gitlab-shell]
   end
-  
+
 Clients --> Praefects --> Gitaly
 ```
 
diff --git a/doc/beginners_guide.md b/doc/beginners_guide.md
index 0fbed62ca..4de508911 100644
--- a/doc/beginners_guide.md
+++ b/doc/beginners_guide.md
@@ -75,7 +75,6 @@ To enable linting in your code editor:
 
 1. Run `make lint` at least once. That builds a version of `golangci-lint` for you.
 1. Point your code editor or code editor's plugin to the binary at `_build/tools/golangci-lint`.
-1. If necessary, add `_build/deps/libgit2/install/lib/pkgconfig` to your `PKG_CONFIG_PATH` environment variable.
 
 #### Experimenting with editing code
 
diff --git a/doc/serverside_git_usage.md b/doc/serverside_git_usage.md
index c6d0faa70..823191bc6 100644
--- a/doc/serverside_git_usage.md
+++ b/doc/serverside_git_usage.md
@@ -1,9 +1,8 @@
 # Server side Git usage
 
-Gitaly uses three implementations to read and write to Git repositories:
+Gitaly uses two implementations to read and write to Git repositories:
 
 1. `git(1)` - The same Git used by clients all over the world
-1. [LibGit2](https://github.com/libgit2/libgit2) - a linkable library used through Rugged and Git2Go
 1. On ad-hoc basis, part of Git is implemented in this repository if the
    implementation is easy and stable. For example the [pktline](../internal/git/pktline) package.
 
diff --git a/internal/testhelper/configure.go b/internal/testhelper/configure.go
index 7788788a3..6dc326057 100644
--- a/internal/testhelper/configure.go
+++ b/internal/testhelper/configure.go
@@ -111,7 +111,7 @@ func configure() (_ func(), returnedErr error) {
 		}
 	}
 
-	// We need to make sure that we're gitconfig-clean: neither Git nor libgit2 should pick up
+	// We need to make sure that we're gitconfig-clean: Git should not pick up
 	// gitconfig files from anywhere but the repository itself in case they're configured to
 	// ignore them. We set that configuration by default in our tests to have a known-good
 	// environment.
diff --git a/internal/testhelper/testcfg/binaries.go b/internal/testhelper/testcfg/binaries.go
index 5da1a88ea..8d403e8b0 100644
--- a/internal/testhelper/testcfg/binaries.go
+++ b/internal/testhelper/testcfg/binaries.go
@@ -102,7 +102,7 @@ func BuildBinary(tb testing.TB, targetDir, sourcePath string) string {
 		}
 
 		buildTags := []string{
-			"static", "system_libgit2", "gitaly_test",
+			"gitaly_test",
 		}
 		if os.Getenv("GITALY_TESTING_ENABLE_FIPS") != "" {
 			buildTags = append(buildTags, "fips")
diff --git a/internal/testhelper/testdata/home/.config/git/config b/internal/testhelper/testdata/home/.config/git/config
index aef95e47e..e6dc1af91 100644
--- a/internal/testhelper/testdata/home/.config/git/config
+++ b/internal/testhelper/testdata/home/.config/git/config
@@ -1,4 +1,4 @@
-# We're trying to catch any instances of libgit2 or Git that pick up the
+# We're trying to catch any instances of Git that pick up the
 # gitconfig even though they're told not to. If they do pick up this file
 # though, then they would fail to parse it and thus return an error, which we
 # can detect quite easily.
diff --git a/internal/testhelper/testdata/home/.gitconfig b/internal/testhelper/testdata/home/.gitconfig
index aef95e47e..e6dc1af91 100644
--- a/internal/testhelper/testdata/home/.gitconfig
+++ b/internal/testhelper/testdata/home/.gitconfig
@@ -1,4 +1,4 @@
-# We're trying to catch any instances of libgit2 or Git that pick up the
+# We're trying to catch any instances of Git that pick up the
 # gitconfig even though they're told not to. If they do pick up this file
 # though, then they would fail to parse it and thus return an error, which we
 # can detect quite easily.