Bug#1023950: mame: Sphinx module now available

[Rob Savoury]

Package: src:mame
Version: 0.249+dfsg.1-1
Severity: normal
Tags: patch

Dear Maintainer,

For some time now the sphinxcontrib.rsvgconverter module has been
available in binary package python3-sphinxcontrib.svg2pdfconverter
built by src:sphinxcontrib-svg2pdfconverter [1] (available in both
Debian stable "Bullseye" and all Ubuntu releases since 19.10 Eoan).

A proposed trivial patch is attached which adds the missing build
dep and removes the unneeded sphinx_remove_unresolved_module.patch.
Thanks for your work in maintaining the MAME package.

[1] https://tracker.debian.org/pkg/sphinxcontrib-svg2pdfconverter