Remove support for preloading on Windows

Due to ASLR restrictions, preloading on Windows does not work with
any code that has preloading dependencies on internal classes.
This effect

Remove support for preloading on Windows

Due to ASLR restrictions, preloading on Windows does not work with
any code that has preloading dependencies on internal classes.
This effectively makes it unusable for any non-trivial codebase.

Instead of pretending like preloading is going to work, only to
make people realize that it really doesn't once they get beyond
a dummy example, we disable support for preloading on Windows
entirely.

Closes GH-4999.

show more ...