Clean up comments in pyproject.toml

Removed unnecessary comments from pyproject.toml.

Author: icemac

pyproject.toml

@@ -1,8 +1,5 @@
 # Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
 # https://github.com/zopefoundation/meta/tree/master/src/zope/meta/pure-python
-# 
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/pure-python
 
 [build-system]
 requires = [