Remove the references to CreateFileMapping2 (#19102)
### Description
Remove the references to CreateFileMapping2 because the function is
mainly for system services. To use the function, we need to link to one
of the four [Windows umbrella
libraries](https://learn.microsoft.com/en-us/windows/win32/apiindex/windows-umbrella-libraries).
It's tricky because a custom build might want to use any of the four. So
I cannot just choose one and add that one to our CMakeLists.txt.
Given it's so complicated and the code is not actually used now, I will
remove it. It is not used because it requires NTDDI_VERSION >=
NTDDI_WIN10_RS5 but in our top level CMakeLists.txt we set the version
to the first Windows 10 release which is lower than RS5.
