Delete dead PAL functions (dotnet/coreclr#13613)

Delete dead PAL functions (dotnet/coreclr#13613)

* Remove duplicate define

* Remove unused wincon.h defines

* Delete unused LockFile/UnlockFile

* Remove unused WszCryptGetDefaultProvider define

* Remove unused defines

* Remove unused defines

* Delete unused GetDiskFreeSpace

* Delete unused RegisterEventSource\DeregisterEventSource\ReportEvent

* Remove unused defines

* Delete unused AreFileApisANSI

* Delete unused MoveFileW

* Delete unused SetFileTime

* Delete unused GetFileTime

* Delete unused FileTimeToDosDateTime

* Delete unused GetFileType

* Delete unused GetConsoleCP

* Delete unused GetExitCodeThread

* Delete unused FlushViewOfFile

* Delete unused RtlZeroMemory

* Delete unused MoveFileA

Commit migrated from https://github.com/dotnet/coreclr/commit/c440335be80ee0762856d0be6e91ec3ea2f90504