[PATCH] Remove redundant wheel dep from pyproject.toml

Remove the redundant `wheel` dependency, as it is added by the backend
automatically.  Listing it explicitly in the documentation was
a historical mistake and has been fixed since, see:
pypa/setuptools@f7d30a9

pyproject.toml

@@ -15,4 +15,4 @@ version-strings = ["setup.py"]
 build-system = "setuptools"
 
 [build-system]
-requires = ["setuptools >= 40.6.0", "wheel"]
+requires = ["setuptools >= 40.6.0"]