Disable PyPy in CI.

Refs #1581.

Author: aaugustin

.github/workflows/tests.yml

@@ -60,12 +60,13 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
-          - "pypy-3.10"
+# Disable PyPy per https://github.com/python-websockets/websockets/issues/1581
+#           - "pypy-3.10"
         is_main:
           - ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
-        exclude:
-          - python: "pypy-3.10"
-            is_main: false
+#         exclude:
+#           - python: "pypy-3.10"
+#             is_main: false
     steps:
     - name: Check out repository
       uses: actions/checkout@v4