Indiscriminately replace function type parameters with int
Summary:
Simplest version of substitution mutation where we replace every type parameter usage with `int` and remove the said type parameters. It only applies to functions.
This is incomplete for various reasons. For example, it doesn't take bounds into account. It also only converts type parameter hint occurrences shallowly.
Reviewed By: vassilmladenov
Differential Revision:
D38183040
fbshipit-source-id:
e938dd52e16eb18bfa0796228d47183ed35ec74c