Remove pypy2 from CI tests and config, tox from Fedora 43 can no longer run it out of the box

Author: hroncok

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
         tox_env: ${{ matrix.tox_env }}
     strategy:
       matrix:
-        tox_env: [py36, py39, py310, py311, py312, py313, py314, pypy2, pypy3]
+        tox_env: [py36, py39, py310, py311, py312, py313, py314, pypy3]
 
     # Use GitHub's Linux Docker host
     runs-on: ubuntu-latest

README.md

@@ -65,6 +65,7 @@ referred to as the "major version") represents the release of Fedora used in the
 ### v43.0
 
 * Uses Fedora 43 as the base container image.
+* Running pypy2 tox environment no longer works out of the box, see [tox documentation for details](https://tox.wiki/en/latest/explanation.html#virtualenv-version-pinning).
 
 ### v42.0
 

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = py36,py39,py310,py311,py312,py313,py314,py314t,pypy2,pypy3
+envlist = py36,py39,py310,py311,py312,py313,py314,py314t,pypy3
 skipsdist = True
 
 [testenv]