removing unused code.

Author: Claus

src/Umbraco.Deploy.Contrib.Connectors/Caching/Comparers/StringArrayComparer.cs

@@ -156,8 +156,6 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Caching\Comparers\StringArrayComparer.cs" />
-    <Compile Include="Caching\InstanceByKeyCache.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Properties\VersionInfo.cs" />
   </ItemGroup>