Cleanup `#include "awint.hpp"`

[AlexGuteniev]

There are fewer places that actually needs #include "awint.hpp" than the places where it is included.

Some may need other includes that included by "awint.hpp" instead, for others this include may be completely superfluous.

After #3936, we shouldn't need #include "awint.hpp" in winapisupp.cpp itself.

[ayushgupta9906]

Please assign this issue to me.

[AlexGuteniev]

Please assign this issue to me.

There's no assignment to contributors.
Feel free to create a PR, whoever makes it, takes it.