rework some initial dependency loading

MediaBrowser.WebDashboard/MediaBrowser.WebDashboard.csproj

@@ -717,12 +717,6 @@
     <Content Include="dashboard-ui\apiclient\deferred.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
-    <Content Include="dashboard-ui\apiclient\alt\deferred.js">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="dashboard-ui\apiclient\device.js">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
     <Content Include="dashboard-ui\apiclient\events.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>