add the link to changelogs; drop included patch

PKGBUILD

 # Maintainer: Chih-Hsuan Yen <yan12125@archlinux.org>
 
 pkgname=python-anyio
-pkgver=3.3.0
+# https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst
+pkgver=3.3.1
 pkgrel=1
 pkgdesc='High level compatibility layer for multiple asynchronous event loop implementations'
 arch=(any)
@@ -16,10 +17,8 @@ optdepends=(
   'python-trio: trio backend'
 )
 source=(https://github.com/agronholm/anyio/archive/$pkgver/anyio-$pkgver.tar.gz
-        https://github.com/agronholm/anyio/commit/5ed3270c8d12cffc4cd3349d9ff32bc32451ae65.patch
         bpo-45097.diff)
-sha256sums=('5872afba5b2a03461e8eb64538d8050d1f64fe54192ad67d8f34f6287ea7c729'
-            '30e94b5a37c124d3620c77abd835384b224eee3349bea0ddd19f3a268e71c9ca'
+sha256sums=('2f27663b77aa484ca85544f6701f7d6710e9cf4fbb23df0990c8447983aabb32'
             'ed0ad72f604697d247a2d74f5b4740fcda0fe478040fa6ff75120cd97d5985c8')
 
 export SETUPTOOLS_SCM_PRETEND_VERSION=$pkgver
@@ -32,9 +31,6 @@ prepare() {
   # [1] https://github.com/pytest-dev/pytest-mock/issues/202
   sed -i 's#MockerFixture#MockFixture#' tests/test_eventloop.py
 
-  # https://github.com/agronholm/anyio/issues/347
-  patch -Np1 -i ../5ed3270c8d12cffc4cd3349d9ff32bc32451ae65.patch
-
   # Work around https://bugs.python.org/issue45097
   patch -Np1 -i ../bpo-45097.diff
 }