dev-release: remove a broken link to sonatype documentation

Change-Id: I02a56c40542561e8f2502221f328db44567c7355
diff --git a/Documentation/dev-release.txt b/Documentation/dev-release.txt
index 6abfb9e..e8bc9f9 100644
--- a/Documentation/dev-release.txt
+++ b/Documentation/dev-release.txt
@@ -222,10 +222,6 @@
 link:https://oss.sonatype.org/[Sonatype Nexus Server].
 
 * Verify the staging repository
-+
-How to do this is described in the
-link:https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-8.a.1.ClosingaStagingRepository[
-Sonatype OSS Maven Repository Usage Guide].
 
 ** Go to the link:https://oss.sonatype.org/[Sonatype Nexus Server] and
 sign in with your Sonatype credentials.