[MD settings] remove condition on site list actionable state

This CL removes a condition on whether a site settings row is 'actionable'.

BUG=650557
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2359403002
Cr-Commit-Position: refs/heads/master@{#421197}

chrome/browser/resources/settings/site_settings/site_list.html

@@ -43,7 +43,7 @@
         <template is="dom-repeat" items="[[sites]]">
           <div class="list-item">
             <div class="start layout horizontal center" on-tap="onOriginTap_"
-                actionable$="[[!isExceptionControlled_(item.source)]]">
+                actionable>
               <div class="favicon-image"
                   style$="[[computeSiteIcon(item.originForDisplay)]]">
               </div>