Remove PKGBUILD

Removed PKGBUILD since the packages is available in the AUR. Added
a note about AUR in README.md

PKGBUILD

@@ -1,42 +0,0 @@
-# PKGBUILD
-
-# Maintainer: Daniele Fucini <dfucini@gmail.com>
-
-pkgname=simple_backup
-pkgdesc='Simple backup script that uses rsync to copy files'
-pkgver=3.2.7
-pkgrel=1
-epoch=1
-url="https://github.com/Fuxino/${pkgname}"
-install=simple_backup.install
-arch=('any')
-license=('GPL3')
-makedepends=('python-setuptools'
-             'python-build'
-             'python-installer'
-             'python-wheel')
-depends=('python'
-         'rsync'
-         'python-dotenv')
-optdepends=('python-systemd: use systemd log'
-            'python-dbus: for desktop notifications')
-conflicts=('simple_backup-git')
-source=(${pkgname}-${pkgver}.tar.gz::https://github.com/Fuxino/${pkgname}/archive/${pkgver}.tar.gz
-        https://github.com/Fuxino/${pkgname}/releases/download/${pkgver}/${pkgname}-${pkgver}.tar.gz.sig)
-validpgpkeys=('7E12BC1FF3B6EDB2CD8053EB981A2B2A3BBF5514')
-sha256sums=('9a441bef4d0948d3a93fbfba5dc667fc1adbd0c58bba870461b77e76ff505c77'
-            'SKIP')
-
-build()
-{
-    cd ${srcdir}/${pkgname}-${pkgver}
-    python -m build --wheel --no-isolation
-}
-
-package()
-{
-    cd ${srcdir}/${pkgname}-${pkgver}
-    python -m installer --destdir=${pkgdir} dist/*.whl
-    install -Dm644 ${pkgname}.conf ${pkgdir}/etc/${pkgname}/${pkgname}.conf
-    install -Dm644 man/${pkgname}.1 ${pkgdir}/usr/share/man/man1/${pkgname}.1
-}

README.md

@@ -41,7 +41,9 @@ python -m build --wheel
 python -m installer dist/*.whl
 ```
 
-For Arch Linux, a PKGBUILD that automates this process is provided.
+For Arch Linux and Arch-based distros, two packages are available in the AUR (aur.archlinux.org):
+- **simple_backup** for the release version
+- **simple_backup-git** for the git version
 
 After installing, copy simple_backup.conf (if you used the PKGBUILD on Arch, it will be in /etc/simple_backup/) to $HOME/.config/simple_backup and edit is as needed.