Remove BindingPath.pkgdef from VisualStudioSetup

Now that we specify CodeBase attributes everywhere, we can remove this.

src/VisualStudio/Setup/BindingPath.pkgdef

-[$RootKey$\BindingPaths\{5EABCC64-FDFC-478D-9123-DAE27341DE85}]
-"$PackageFolder$"=""

src/VisualStudio/Setup/VisualStudioSetup.csproj

@@ -202,9 +202,6 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AssemblyRedirects.cs" Condition="('$(AssemblyVersion)' == '42.42.42.42') or ('$(OfficialBuild)' == 'true')" />
-    <Content Include="BindingPath.pkgdef">
-      <IncludeInVSIX>true</IncludeInVSIX>
-    </Content>
     <Compile Include="ProvideRoslynBindingRedirection.cs" />
   </ItemGroup>
   <ImportGroup Label="Targets">

src/VisualStudio/Setup/source.extension.vsixmanifest

@@ -15,7 +15,6 @@
     <Dependency Id="Microsoft.Framework.NDP" DisplayName="Microsoft .NET Framework" d:Source="Manual" Version="[4.5,)" />
   </Dependencies>
   <Assets>
-    <Asset Type="Microsoft.VisualStudio.VsPackage" Path="BindingPath.pkgdef" />
     <Asset Type="Microsoft.VisualStudio.MefComponent" Path="Microsoft.CodeAnalysis.Workspaces.dll" />
     <Asset Type="Microsoft.VisualStudio.MefComponent" Path="Microsoft.CodeAnalysis.Workspaces.Desktop.dll" />
     <Asset Type="Microsoft.VisualStudio.MefComponent" Path="Microsoft.CodeAnalysis.EditorFeatures.dll" />