docs: remove mailing list as way of submitting patches

All developers now use gitlab, don't confuse newcomers by suggesting
they might use the mailing list. We want everyone to use gitlab so
that patches get run through basic CI before they are merged.

Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Dylan Baker <dylan@pnwbakers.com>

README.rst

@@ -56,5 +56,4 @@ Contributions are welcome, and step-by-step instructions can be found in our
 documentation (`docs/submittingpatches.html
 <https://mesa3d.org/submittingpatches.html>`_).
 
-Note that Mesa uses email mailing-lists for patches submission, review and
-discussions.
+Note that Mesa uses gitlab for patches submission, review and discussions.

docs/submittingpatches.html

@@ -42,9 +42,7 @@ components.
 <code>git bisect</code>.)
 <li>Patches should be properly <a href="#formatting">formatted</a>.
 <li>Patches should be sufficiently <a href="#testing">tested</a> before submitting.
-<li>Patches should be <a href="#submit">submitted</a>
-to <a href="#mailing">mesa-dev</a> or with
-a <a href="#merge-request">merge request</a>
+<li>Patches should be <a href="#submit">submitted</a> via a merge request</a>
 for <a href="#reviewing">review</a>.
 
 </ul>
@@ -161,67 +159,13 @@ replacing <code>"meson test"</code> with whatever other test you want to
 run.
 </p>
 
-
 <h2 id="submit">Submitting Patches</h2>
 
 <p>
-Patches may be submitted to the Mesa project by
-<a href="#mailing">email</a> or with a
-GitLab <a href="#merge-request">merge request</a>. To prevent
-duplicate code review, only use one method to submit your changes.
-</p>
-
-<h3 id="mailing">Mailing Patches</h3>
-
-<p>
-Patches may be sent to the mesa-dev mailing list for review:
-<a href="https://lists.freedesktop.org/mailman/listinfo/mesa-dev">
-mesa-dev@lists.freedesktop.org</a>.
-When submitting a patch make sure to use
-<a href="https://git-scm.com/docs/git-send-email">git send-email</a>
-rather than attaching patches to emails. Sending patches as
-attachments prevents people from being able to provide in-line review
-comments.
-</p>
-
-<p>
-When submitting follow-up patches you can use --in-reply-to to make v2, v3,
-etc patches show up as replies to the originals. This usually works well
-when you're sending out updates to individual patches (as opposed to
-re-sending the whole series). Using --in-reply-to makes
-it harder for reviewers to accidentally review old patches.
-</p>
-
-<p>
-When submitting follow-up patches you should also login to
-<a href="https://patchwork.freedesktop.org">patchwork</a> and change the
-state of your old patches to Superseded.
+Patches are submitted to the Mesa project via a
+<a href="https://gitlab.freedesktop.org/mesa/mesa">GitLab</a> Merge Request.
 </p>
 
-<p>
-Some companies' mail server automatically append a legal disclaimer,
-usually containing something along the lines of "The information in this
-email is confidential" and "distribution is strictly prohibited".
-</p>
-<p>
-These legal notices prevent us from being able to accept your patch,
-rendering the whole process pointless. Please make sure these are
-disabled before sending your patches. (Note that you may need to contact
-your email administrator for this.)
-</p>
-
-<h3 id="merge-request">GitLab Merge Requests</h3>
-
-<p>
-  <a href="https://gitlab.freedesktop.org/mesa/mesa">GitLab</a> Merge
-  Requests (MR) can also be used to submit patches for Mesa.
-</p>
-
-<p>
-  If the MR may have interest for most of the Mesa community, you can
-  send an email to the mesa-dev email list including a link to the MR.
-  Don't send the patch to mesa-dev, just the MR link.
-</p>
 <p>
   Add labels to your MR to help reviewers find it. For example:
 </p>
@@ -270,16 +214,15 @@ your email administrator for this.)
 <h2 id="reviewing">Reviewing Patches</h2>
 
 <p>
-  To participate in code review, you should monitor the
-  <a href="https://lists.freedesktop.org/mailman/listinfo/mesa-dev">
-  mesa-dev</a> email list and the GitLab
-  Mesa <a href="https://gitlab.freedesktop.org/mesa/mesa/merge_requests">Merge
-  Requests</a> page.
+  To participate in code review, you can monitor the GitLab Mesa
+ <a href="https://gitlab.freedesktop.org/mesa/mesa/merge_requests">Merge
+  Requests</a> page, and/or register for notifications in your gitlab
+  settings.
 </p>
 
 <p>
-When you've reviewed a patch on the mailing list, please be unambiguous
-about your review.  That is, state either
+When you've reviewed a patch, please be unambiguous about your review.
+  That is, state either
 </p>
 <pre>
     Reviewed-by: Joe Hacker &lt;jhacker@foo.com&gt;