chore(sns-share): remove data-hashtags

Author: kubosho

src/static/sns-share.html

@@ -4,7 +4,7 @@
 <script defer src="https://widgets.getpocket.com/v1/j/btn.js?v=1" id="pocket-btn-js"></script>
 
 <div class="share-buttons">
-    <a href="https://twitter.com/share" class="twitter-share-button" data-hashtags="steinsgit">ツイート</a>
+    <a href="https://twitter.com/share" class="twitter-share-button">ツイート</a>
     <a class="github-button" href="https://github.com/o2project/steins-git" data-show-count="true"
         aria-label="Star o2project/steins-git on GitHub">Star</a>
     <a class="github-button" href="https://github.com/o2project/steins-git/subscription" data-show-count="true"