Makefile: Omit isso.cfg from rst sources
Since the conf is no longer provided as a `:download` in
sphinx, it can be removed from the target dependencies.
@@ -20,8 +20,7 @@ ISSO_PY_SRC := $(shell git ls-files | grep -E "^isso/.+.py$$")
DOCS_RST_SRC := $(shell find docs/ -type f -name '*.rst') \
$(wildcard docs/_isso/*) \
- docs/index.html docs/conf.py docs/docutils.conf \
- isso/isso.cfg
+ docs/index.html docs/conf.py docs/docutils.conf
DOCS_CSS_SRC := docs/_static/css/site.scss
