C#: Update integration tests.

Author: michaelnebel

csharp/ql/integration-tests/posix-only/standalone_dependencies/Assemblies.expected

@@ -169,4 +169,3 @@
 | /microsoft.netcore.app.ref/7.0.2/ref/net7.0/mscorlib.dll |
 | /microsoft.netcore.app.ref/7.0.2/ref/net7.0/netstandard.dll |
 | /newtonsoft.json/12.0.1/lib/portable-net45+win8+wp8+wpa81/Newtonsoft.Json.dll |
-| /nunit/3.13.3/lib/netstandard2.0/nunit.framework.dll |

csharp/ql/integration-tests/windows-only/standalone_dependencies/Assemblies.expected

@@ -213,4 +213,3 @@
 | /microsoft.windowsdesktop.app.ref/7.0.2/ref/net7.0/WindowsBase.dll |
 | /microsoft.windowsdesktop.app.ref/7.0.2/ref/net7.0/WindowsFormsIntegration.dll |
 | /newtonsoft.json/12.0.1/lib/portable-net45+win8+wp8+wpa81/Newtonsoft.Json.dll |
-| /nunit/3.13.3/lib/netstandard2.0/nunit.framework.dll |