use common sharing manager

MediaBrowser.WebDashboard/MediaBrowser.WebDashboard.csproj

@@ -368,9 +368,6 @@
     <Content Include="dashboard-ui\scripts\shared.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
-    <Content Include="dashboard-ui\scripts\sharingmanager.js">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
     <Content Include="dashboard-ui\components\sharingwidget.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>