Fix twine usage, stop uploading wheels

Author: niklasf

release.py

@@ -97,9 +97,9 @@ def tag_and_push():
 def pypi():
     print("--- PYPI ---------------------------------------------------------")
     system("rm -rf build")
-    system("python3 setup.py sdist bdist_wheel")
+    system("python3 setup.py sdist")
     system("twine check dist/*")
-    system("twine upload --skip-existing")
+    system("twine upload --skip-existing dist/*")
 
 
 def github_release(tagname):