Update navbar.html

Author: arnavk23

_layout/navbar.html

@@ -52,13 +52,6 @@
       </a>
     </div>
 
-    <div class="navbar-end">
-      <a class="navbar-item icon-text" href="https://github.com/orgs/JuliaSmoothOptimizers/discussions">
-        <span class="icon">
-          <ion-icon size="large" name="chatbubbles-outline"></ion-icon>
-        </span>
-        <span>Discussions</span>
-      </a>
 
       <a class="navbar-item icon-text" href="https://github.com/JuliaSmoothOptimizers/juliasmoothoptimizers.github.io/issues">
         <span class="icon">