docs: drop outdated gallium-docs comment
The separate readthedocs documentation is quite pointless these days, as
it's been moved to docs.mesa3d.org, where all other documentation
already is. There's nothing special about this documentation any longer.
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6893>
diff --git a/docs/sourcedocs.rst b/docs/sourcedocs.rst
index b658bae..0499cf8 100644
--- a/docs/sourcedocs.rst
+++ b/docs/sourcedocs.rst
@@ -16,6 +16,3 @@
If you're reading this page from your local copy of Mesa, and have run
the doxygen scripts, you can read the documentation
`here <../doxygen/main/index.html>`__
-
-Gallium is also documented using Sphinx. The generated output can be
-found `on Gallium.ReadTheDocs.io <https://gallium.readthedocs.io>`__.