ci: Remove pypy-3.8 until a numpy wheel is released for it

Author: kmsquire

.github/workflows/test.yml

@@ -9,7 +9,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "pypy-3.8"]
+        # Remove pypy-3.8 until it supports numpy
+        python-version: ["3.7", "3.8", "3.9", "3.10"]  # "pypy-3.8"
         os: [ubuntu-20.04, macos-10.15, windows-2019]
     steps:
     - name: Checkout