docs/release: drop references to patchwork

The changes to release.sh have landed, so all we need is a recent
checkout of xorg-utils.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/docs/releasing.html b/docs/releasing.html
index 400cf92..30ac5c8 100644
--- a/docs/releasing.html
+++ b/docs/releasing.html
@@ -408,11 +408,6 @@
 <h3>Use the release.sh script from xorg util-macros</h3>
 
 <p>
-If latest checkout [still] does not the mesa integration, fetch the patches
-from <a href="https://patchwork.freedesktop.org/series/15176/">Patchwork</a>.
-</p>
-
-<p>
 Ensure that the mesa git tree is clean via <code>git clean -fXd</code> and
 start the release process.
 </p>