chore(column-fill): remove balance-all example

See:
- mdn/content#34561
- mdn/browser-compat-data#23578

live-examples/css-examples/multi-column-layout/column-fill.html

@@ -12,12 +12,6 @@
       <span class="visually-hidden">Copy to Clipboard</span>
     </button>
   </div>
-  <div class="example-choice">
-    <pre><code class="language-css">column-fill: balance-all;</code></pre>
-    <button type="button" class="copy hidden" aria-hidden="true">
-      <span class="visually-hidden">Copy to Clipboard</span>
-    </button>
-  </div>
 </section>
 
 <div id="output" class="output large hidden">