We don't need this

Author: shana

src/GitHub.UI/Controls/DropDownActionLinkBehaviour.cs

@@ -80,7 +80,6 @@
     <Compile Include="Behaviours\AddEmptyItemToList.cs" />
     <Compile Include="Behaviours\ClosePopupAction.cs" />
     <Compile Include="Behaviours\OpenPopupAction.cs" />
-    <Compile Include="Controls\DropDownActionLinkBehaviour.cs" />
     <Compile Include="Controls\Octicons\OcticonPaths.Designer.cs">
       <AutoGen>True</AutoGen>
       <DesignTime>True</DesignTime>