Fix duplicate top line in NEWS.rst
Fix duplicate top line in NEWS.rst

It looks like towncrier unconditionally writes top_line
when it is defined in the title_format configuration.
So we must not repeat it in the template.
When running towncrier with --draft, it works differently
so in that case the top line is not shown...

pradyunsg/pip,pfmoore/pip,sbidoul/pip,pypa/pip,pradyunsg/pip,sbidoul/pip,pfmoore/pip,pypa/pip