Fix stubtest unused script (#5411)

Contrary to the comment, this wasn't a mypy_primer issue, nor even a
stubtest issue.

Co-authored-by: hauntsaninja <>

.github/workflows/stubtest-unused-whitelist.yml

@@ -50,9 +50,6 @@ jobs:
         uses: actions/download-artifact@v2
         with:
           name: stubtest-output
-      # TODO: maybe mypy_primer should always output forward slashes
-      - name: Fix slashes
-        run: sed -i 's:\\:/:g' stubtest-output-windows-*
       - name: Collate duplicates
         run: cat stubtest-output-* | sort -u | tee stubtest-output
       - name: Remove entries from whitelists