contents/index: update sponsors

Author: hajimehoshi

contents/index.html

@@ -66,12 +66,6 @@ <h3>Gold</h3>
       <figcaption><a href="https://odencat.com/">Odencat Inc.</a><br>(Works: <a href="https://odencat.com/bearsrestaurant/switch/en.html">Bear's Restaurant</a>, <a href="https://odencat.com/fishingparadiso/en.html">Fishing Paradiso</a>, <a href="https://odencat.com/en/game/mousebusters/">Mousebusters</a>, <a href="https://odencat.com/bakemono/">Meg's Monster</a>, etc.)</figcaption>
     </figure>
   </div>
-  <div class="grid-item-2">
-    <figure>
-      <p class="img avatar"><a href="https://symbolic.software/"><img src="/images/symbolic_software.png" width="168"></a></p>
-      <figcaption><a href="https://symbolic.software/">Symbolic Software</a><br>(Works: <a href="https://drkobushi.com">Dr. Kobushi's Labyrinthine Laboratory</a>)</figcaption>
-    </figure>
-  </div>
 </div>
 <h3>Silver</h3>
 <div class="grid-container">

contents/ja/index.html

@@ -66,12 +66,6 @@ <h3>ゴールド</h3>
       <figcaption><a href="https://odencat.com/">Odencat 株式会社</a><br>(作品: <a href="https://odencat.com/bearsrestaurant/switch/ja.html">くまのレストラン</a>、<a href="https://odencat.com/fishingparadiso/ja.html">フィッシングパラダイス</a>、<a href="https://odencat.com/ja/game/mousebusters/">ねずみバスターズ</a>、<a href="https://odencat.com/bakemono/">メグとばけもの</a>、他)</figcaption>
     </figure>
   </div>
-  <div class="grid-item-2">
-    <figure>
-      <p class="img avatar"><a href="https://symbolic.software/"><img src="/images/symbolic_software.png" width="168"></a></p>
-      <figcaption><a href="https://symbolic.software/">Symbolic Software</a><br>(作品: <a href="https://drkobushi.com">こぶし博士の迷宮研究所</a>)</figcaption>
-    </figure>
-  </div>
 </div>
 <h3>シルバー</h3>
 <div class="grid-container">