setup.py: fix setuptools>=61 compatibility

Closes ArchipelagoMW/Archipelago#391

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
           Expand-Archive -Path enemizer.zip -DestinationPath EnemizerCLI -Force
       - name: Build
         run: |
-          python -m pip install --upgrade pip setuptools==60.10.0  # 61 does not work with the current layout
+          python -m pip install --upgrade pip setuptools
           pip install -r requirements.txt
           python setup.py build --yes
           $NAME="$(ls build)".Split('.',2)[1]
@@ -72,7 +72,7 @@ jobs:
       - name: Build
         run: |
           # pygobject is an optional dependency for kivy that's not in requirements
-          "${{ env.PYTHON }}" -m pip install --upgrade pip virtualenv PyGObject setuptools==60.10.0  # setuptools same as windows
+          "${{ env.PYTHON }}" -m pip install --upgrade pip virtualenv PyGObject setuptools
           "${{ env.PYTHON }}" -m venv venv
           source venv/bin/activate
           pip install -r requirements.txt

setup.py

@@ -408,6 +408,7 @@ def find_lib(lib, arch, libc):
     version=f"{version_tuple.major}.{version_tuple.minor}.{version_tuple.build}",
     description="Archipelago",
     executables=exes,
+    ext_modules=[],  # required to disable auto-discovery with setuptools>=61
     options={
         "build_exe": {
             "packages": ["websockets", "worlds", "kivy"],