note that Arch Linux now requires install from source

docs/installation.md

@@ -84,18 +84,9 @@ and you can see a list of supported architectures
 
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-### Arch Linux / `PKGBUILD` or `AUR`
+### Arch Linux
 
-The _Arch_ way to install git-secret is to use the directions for
-"Installing Packages" at [Arch User Repository Documentation](https://wiki.archlinux.org/index.php/Arch_User_Repository#Installing_packages)
-along with the `PKGBUILD` file from the [git-secret Arch Linux Package](https://aur.archlinux.org/packages/git-secret/)
-
-You can also install from the [AUR](https://aur.archlinux.org/) using your helper of choice by
-installing the package `git-secret`, for example using [yay](https://github.com/Jguer/yay)
-
-```bash
-yay -S git-secret
-```
+Use `Manual Installation` method described below.
 
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