Update development docs on libgit2

Since the move to using statically built versions of the dependency libraries
it is no longer required for users to install libgit2 into their development
environments.

Signed-off-by: Paulo Gomes <[email protected]>

Author: Paulo Gomes

DEVELOPMENT.md

@@ -13,44 +13,26 @@ There are a number of dependencies required to be able to run the controller and
 - [Install Docker](https://docs.docker.com/engine/install/)
 - (Optional) [Install Kubebuilder](https://book.kubebuilder.io/quick-start.html#installation)
 
-The dependency [libgit2](https://libgit2.org/) also needs to be installed to be able
-to run `source-controller` or its test-suite locally (not in a container).
-
-In case this dependency is not present on your system (at the expected
-version), the first invocation of a `make` target that requires the
-dependency will attempt to compile it locally to `hack/libgit2`. For this build
-to succeed ensure the following dependencies are present on your system:
-- [CMake](https://cmake.org/download/)
-- [OpenSSL 1.1](https://www.openssl.org/source/)
-- [LibSSH2](https://www.libssh2.org/)
-- [pkg-config](https://freedesktop.org/wiki/Software/pkg-config/)
-
-Triggering a manual build of the dependency is possible as well by running
-`make libgit2`. To enforce the build, for example if your system dependencies
-match but are not linked in a compatible way, append `LIBGIT2_FORCE=1` to the
-`make` command.
-
-Follow the instructions below to install these dependencies to your system.
+The [libgit2](https://libgit2.org/) dependency is now automatically managed by the Makefile logic.
+However, it depends on [pkg-config](https://freedesktop.org/wiki/Software/pkg-config/) being installed:
 
 ### macOS
 
 ```console
-$ # Ensure libgit2 dependencies are available
-$ brew install cmake [email protected] libssh2 pkg-config
-$ LIBGIT2_FORCE=1 make libgit2
+$ # Ensure pkg-config is installed
+$ brew install pkg-config
 ```
 
 ### Linux
 
 ```console
-$ # Ensure libgit2 dependencies are available
-$ pacman -S cmake openssl libssh2
-$ LIBGIT2_FORCE=1 make libgit2
+$ # Ensure pkg-config is installed
+$ pacman -S pkgconf
 ```
 
 **Note:** Example shown is for Arch Linux, but likewise procedure can be
 followed using any other package manager. Some distributions may have slight 
-variation of package names (e.g. `apt install -y cmake openssl libssh2-1-dev`).
+variation of package names (e.g. `apt install -y pkg-config`).
 
 In addition to the above, the following dependencies are also used by some of the `make` targets: