remove unused templates

views/partials/share-dialog.html

-<div class="dialog-section no-b" style="width: 420px;">
-  <p class="lead"> Share this with others</p>
-</div>

views/partials/tool/toolbar-social.html

-<div class="toolbar toolbar-social"
-     v-bind:class="{in : active_space_role=='viewer' || (present_mode && active_space.access_mode=='public')}"
-     v-if="social_bar && active_space_loaded">
-  <div class="btn-group dark">
-
-    <div id="share-dialog" class="dropdown bottomleft light center static" v-bind:class="{open:opened_dialog=='share'}">
-      <button class="btn btn-primary btn-icon-labeled" v-on:click="open_dialog('share')">
-        <span class="icon icon-share" style="color:white"></span>
-        <span class="icon-label" style="color:white"> Share </span>
-      </button>
-
-      <div class="dialog">
-          {% include "./share.html" %}
-      </div>
-    </div>
-
-    <div id="share-dialog" class="dropdown bottom light center static" v-bind:class="{open:opened_dialog=='embed'}">
-      <button class="btn btn-transparent btn-icon-labeled" v-on:click="open_dialog('embed')">
-        <span class="icon icon-embed"></span>
-        <span class="icon-label"> Embed </span>
-      </button>
-
-      <div class="dialog">
-          {% include "./embed.html" %}
-      </div>
-    </div>
-
-  </div>
-</div>