Speculatively revert "Make the object store visible in Observatory."

runtime/observatory/lib/src/elements/isolate_view.html

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="action_link.html">
 <link rel="import" href="curly_block.html">
 <link rel="import" href="eval_box.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="isolate_summary.html">
 <link rel="import" href="library_ref.html">
-<link rel="import" href="objectstore_ref.html">
 <link rel="import" href="nav_bar.html">
 <link rel="import" href="observatory_element.html">
 <link rel="import" href="script_inset.html">
 <link rel="import" href="script_ref.html">
 <link rel="import" href="view_footer.html">
 
 <polymer-element name="isolate-view" extends="observatory-element">
   <template>
     <link rel="stylesheet" href="css/shared.css">
     <style>
@@ skipping 69 matching lines @@
               </template>
             </div>
             <div class="memberItem">
               <div class="memberName">isolate id</div>
               <div class="memberValue">{{ isolate.number }}</div>
             </div>
             <div class="memberItem">
               <div class="memberName">service protocol extensions</div>
               <div class="memberValue">{{ isolate.extensionRPCs }}</div>
             </div>
-            <div class="memberItem">
-              <div class="memberName">object store</div>
-              <div class="memberValue">
-                <objectstore-ref ref="{{ isolate.objectStore }}"></objectstore-ref>
-              </div>
-            </div>
 
             <div class="memberItem">
               <div class="memberName">
                 <action-link callback="{{ reloadSources }}"
                              label="reload sources">
                 </action-link>
               </div>
             </div>
           </div>
 
@@ skipping 26 matching lines @@
       <hr>
       <script-inset script="{{ rootLibrary.rootScript }}">
       </script-inset>
     </div>
 
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="isolate_view.dart"></script>