Drop reference to subversion.
diff --git a/src/site/xdoc/issue-tracking.xml b/src/site/xdoc/issue-tracking.xml
index 49ea460..ad4f943 100644
--- a/src/site/xdoc/issue-tracking.xml
+++ b/src/site/xdoc/issue-tracking.xml
@@ -85,7 +85,7 @@
       </p>
 
       <p>
-      For more information on subversion and creating patches see the
+      For more information on creating patches see the
       <a href="https://www.apache.org/dev/contributors.html">Apache Contributors Guide</a>.
       </p>