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