Removed vuln fix System.Text.Json dep

System.Text.Json was only added to fix a vulnerability caused by an old version referenced transitively. After the update to .NET 8 and update of all dependencies it can now be removed again.

Author: ckadluba

Directory.Packages.props

@@ -16,7 +16,6 @@
     <PackageVersion Include="FluentAssertions" Version="6.12.1" />
     <PackageVersion Include="Dapper.StrongName" Version="2.1.35" />
     <PackageVersion Include="Moq" Version="4.18.2" />
-    <PackageVersion Include="System.Text.Json" Version="6.0.10" />
     <PackageVersion Include="xunit" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
     <PackageVersion Include="Serilog" Version="4.1.0" />