Remove Microsoft.DurableTask.Sidecar.Protobuf reference in Shared.csproj (#356)

Author: bachuv

src/Shared/Shared.csproj

@@ -17,7 +17,6 @@
     <PackageReference Include="Microsoft.Azure.DurableTask.Core" Version="2.8.0" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="6.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.0" />
-    <PackageReference Include="Microsoft.DurableTask.Sidecar.Protobuf" Version="0.3.1" />
   </ItemGroup>
 
 </Project>