[JENKINS-63014] Stop passing extra -url to agents

core/src/main/resources/hudson/slaves/SlaveComputer/slave-agent.jnlp.jelly

@@ -89,21 +89,6 @@ THE SOFTWARE.
 
         <argument>-url</argument>
         <argument>${rootURL}</argument>
-
-        <j:if test="${rootURL!=app.rootUrlFromRequest}">
-          <!--
-            rootURL is based on the URL in the system config, but there has been
-            numerous reports about people moving Jenkins to another place but
-            forgetting to update it. To improve the user experience in this regard,
-            let's also pass the URL that the browser sent us as well, so that the
-            JNLP Main class can try both.
-
-            Note that rootURL is still necessary in various situations, such
-            as reverse HTTP proxy situation, which makes rootUrlFromRequest incorrect.
-          -->
-          <argument>-url</argument>
-          <argument>${app.rootUrlFromRequest}</argument>
-        </j:if>
       </application-desc>
     </jnlp>
   </l:view>