Remove horizontal rules from proxy quickstart

There is now styling to add a top border to the sect1 divs so the hrs
are redundant and look off.

Signed-off-by: Robert Young <robertyoungnz@gmail.com>

Author: robobario

documentation/0.14.0/html/proxy-quick-start/content.html

@@ -7,7 +7,6 @@
     <div class="paragraph">
      <p>Get Kroxylicious, the snappy open source proxy for Apache Kafka®, up and running in minutes.</p>
     </div>
-    <hr>
    </div>
   </div>
   <div class="sect1">
@@ -65,7 +64,6 @@ <h2 id="prerequisites">1. Prerequisites</h2>
       </li>
      </ul>
     </div>
-    <hr>
    </div>
   </div>
   <div class="sect1">
@@ -101,7 +99,6 @@ <h2 id="download_and_install_the_proxy">2. Download and Install the Proxy</h2>
       </tbody>
      </table>
     </div>
-    <hr>
    </div>
   </div>
   <div class="sect1">
@@ -123,7 +120,6 @@ <h2 id="configure_the_proxy">3. Configure the Proxy</h2>
       </tbody>
      </table>
     </div>
-    <hr>
    </div>
   </div>
   <div class="sect1">
@@ -142,7 +138,6 @@ <h2 id="start_the_proxy">4. Start the Proxy</h2>
     <div class="paragraph">
      <p>To use a custom configuration, simply replace the file path after the <code>--config</code> flag.</p>
     </div>
-    <hr>
    </div>
   </div>
   <div class="sect1">