Fix issue links in the generated site's release history page

Author: garydgregory

pom.xml

@@ -33,10 +33,6 @@
 
     <url>https://commons.apache.org/proper/commons-email/</url>
 
-    <issueManagement>
-        <url>https://issues.apache.org/jira/browse/EMAIL</url>
-    </issueManagement>
-
     <scm>
         <connection>scm:git:https://gitbox.apache.org/repos/asf/commons-email</connection>
         <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/commons-email</developerConnection>