Remove duplcated test assemblies from System.Runtime

[weshaggard]

As part of #33101 these
assemblies were moved under System.Reflection but weren't
deleted from System.Runtime so this work finishes up the move.

fixes https://github.com/dotnet/corefx/issues/33219

PTAL @Stoub @MaximLipnin

[ViktorHofer]

I think you meant @stephentoub and not @Stoub :D

[stephentoub]

Thanks, Wes.

[weshaggard]

test Linux x64 Release Build

[danmoseley]

Test failure

Assert.Throws() Failure
Expected: typeof(System.IO.FileNotFoundException)
Actual:   (No exception was thrown)
Stack Trace :
   at System.Reflection.Tests.AssemblyNameTests.Constructor_String_LoadVersionTest() in /mnt/j/workspace/dotnet_corefx/master/linux-TGroup_netcoreapp+CGroup_Release+AGroup_x64+TestOuter_false_prtest/src/System.Reflection/tests/AssemblyNameTests.cs:line 55

[weshaggard]

@dotnet-bot test this please

[weshaggard]

@stephentoub @danmosemsft it does look like AssemblyNameTests.Constructor_String_LoadVersionTest seems to failing from multiple PR's. Are you guys seeing the same things? If it fails again I'm going to disable it as part of this PR.

[stephentoub]

Are you guys seeing the same things?

Yes, though I was hoping it would be resolved by yours :)

[weshaggard]

I'll resolve it by disabling the test and filing an issue.

[weshaggard]

@joperezr @ericstj we probably should have another look at our packaging CI leg as it seems to be the long pole during our CI legs and taking more then an hour. We should see if we can streamline or perhaps prune some of the matrix.