Revert "manually install pip on Windows .__."

This reverts commit f764fd6.

Author: harisont

.github/workflows/build-binary-packages.yml

@@ -104,9 +104,6 @@ jobs:
           automake \
           libtool
         cabal v1-install alex happy
-        curl https://bootstrap.pypa.io/get-pip.py
-        python get-pip.py
-        rm get-pip.py
         pip install setuptools
 
     - name: Build package