Delete reflection blocking on GetThreadDeserializationTracker

[jkotas]

Fixes mono/mono#15112

[Dotnet-GitSync-Bot]

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[jkotas]

This method is one of the method that seem to suffer from #45906 . @sandreenko has been hitting problems with it. Since we have agreed earlier that it is not worth it to go out of our way to protect this from private reflection, it is best to delete it to reduce differences between runtimes and reduce performance overhead of this

[BruceForstall]

@jkotas I just saw:

Assert failure(PID 10008 [0x00002718], Thread: 9560 [0x2558]): Consistency check failed: No method entry found for System.Threading.Thread::GetThreadDeserializationTracker.
FAILED: 0 != id

<no module>! <no symbol> + 0x0 (0x00000000)
    File: C:\gh\runtime\src\coreclr\vm\ecall.cpp Line: 385
    Image: c:\bugs\spmi\coreroot.windows.arm.Checked\windows.arm.Checked\Tests\Core_Root\CoreRun.exe

(on Windows arm32)

Is this a Windows arm32-specific issue? OR perhaps my incremental build didn't build enough?

[jkotas]

It looks like an incremental build problem to me.