Fix duplicate entry typo

templates/standalone-ha.xml.j2

@@ -511,7 +511,7 @@
             <buffer-cache name="default"/>
             <server name="default-server">
                 <ajp-listener name="ajp" socket-binding="ajp"/>
-                <http-listener name="default" read-timeout="30000" socket-binding="http"  socket-binding="http" redirect-socket="proxy-https" proxy-address-forwarding="true" enable-http2="true"/>
+                <http-listener name="default" read-timeout="30000"  socket-binding="http" redirect-socket="proxy-https" proxy-address-forwarding="true" enable-http2="true"/>
                 <https-listener name="https" socket-binding="https" security-realm="ApplicationRealm" enable-http2="true"/>
                 <host name="default-host" alias="localhost">
                     <location name="/" handler="welcome-content"/>