feat: remove Netpoll docs and homepage references

Agent-Logs-Url: https://github.com/cloudwego/cloudwego.github.io/sessions/515bde31-47e1-439b-bb10-9d4b711a506b

Co-authored-by: GuangmingLuo <16001996+GuangmingLuo@users.noreply.github.com>

Author: Copilot

content/en/_index.html

@@ -74,12 +74,6 @@ <h2>Hertz</h2>
             <p>Next-gen, high-performance Go HTTP framework simplifying microservices development.</p>
         </a>
     </div>
-    <div class="col-md-3 col-sm-6 col-xs-12 home-project-item">
-        <a href="https://github.com/cloudwego/netpoll">
-            <h2>Netpoll</h2>
-            <p>High-performance NIO network library, dedicated to building reliable, efficient services with a focus on RPC scenarios.</p>
-        </a>
-    </div>
     <div class="col-md-3 col-sm-6 col-xs-12 home-project-item">
         <a href="https://github.com/cloudwego/volo">
             <h2>Volo</h2>
@@ -182,7 +176,6 @@ <h2 class="home-section-title">Enterprise Users</h2>
             <li><a href="{{< relref "/docs/kitex">}}">Kitex</a></li>
             <li><a href="{{< relref "/docs/hertz">}}">Hertz</a></li>
             <li><a href="{{< relref "/docs/volo">}}">Volo</a></li>
-            <li><a href="{{< relref "/docs/netpoll">}}">Netpoll</a></li>
             <li><a href="{{< relref "/docs/eino">}}">Eino</a></li>
         </ul>
     </div>
@@ -192,7 +185,6 @@ <h2 class="home-section-title">Enterprise Users</h2>
             <li><a target="_blank" rel="noopener noreferrer" href="https://github.com/cloudwego/kitex">Kitex</a></li>
             <li><a target="_blank" rel="noopener noreferrer" href="https://github.com/cloudwego/hertz">Hertz</a></li>
             <li><a target="_blank" rel="noopener noreferrer" href="https://github.com/cloudwego/volo">Volo</a></li>
-            <li><a target="_blank" rel="noopener noreferrer" href="https://github.com/cloudwego/netpoll">Netpoll</a></li>
             <li><a target="_blank" rel="noopener noreferrer" href="https://github.com/bytedance/sonic">Sonic</a></li>
             <li><a target="_blank" rel="noopener noreferrer" href="https://github.com/cloudwego/eino">Eino</a></li>
         </ul>