Drop test of pypy with python 3.8.

Author: janiversen

.github/workflows/ci.yml

@@ -75,16 +75,6 @@ jobs:
           - version: '3.9'
           - version: '3.10'
           - version: '3.11'
-          - version: pypy-3.8
-        exclude:
-          - os:
-              on: macos-latest
-            python:
-              version: pypy-3.8
-          - os:
-              on: windows-latest
-            python:
-              version: pypy-3.8
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3