chore: remove Windows PyPy 3.9 workaround on GHA

Now that PyPy 7.3.9 is out, the workaround is not needed anymore.

.github/workflows/test.yml

@@ -40,20 +40,6 @@ jobs:
           python -m pip install nox
         shell: bash
 
-      # PyPy 3.9 for Windows changed the binary name from pypy3 to pypy3.9
-      # PyPy 3.7 & 3.8 for Windows still only have pypy3
-      # https://foss.heptapod.net/pypy/pypy/-/commit/f15239a703325d97ca4fa655d00f3c05f58bd8be adds back pypy3 on 3.9
-      # pypy3 will be the only 'pypy3'-prefixed common exe name for all platforms once PyPy 7.3.9 is out
-      # TODO remove this step once pypy3.9 7.3.9 is released
-      - name: Fix-up PyPy 3.9 executable
-        run: |
-          cd $(dirname $(which python))
-          if [ ! -f pypy3.exe ]; then
-            ln -s python.exe pypy3.exe
-          fi
-        shell: bash
-        if: ${{ (matrix.os == 'Windows') && (matrix.python_version == 'pypy-3.9') }}
-
       - name: Run nox
         run: |
           python -m nox --error-on-missing-interpreters -s tests-${{ matrix.python_version }}