remove unused files

customize.dist/BottomBar.html

@@ -1,16 +0,0 @@
-<!-- This is an HTML fragment which is included into the bottom toolbar -->
-<div>
-  <div class="bottom-bar">
-    <div class="bottom-bar-left">
-      <span class="bottom-bar-language">
-        <select id="language-selector"></select>
-      </span>
-      <p data-localization="bottom_france">
-      </p>
-   </div>
-    <div class="bottom-bar-right">
-      <p data-localization="bottom_support">
-      </p>
-    </div>
-  </div>
-</div>