Remove the PInvoke analyzer from runtime repo build

[tarekgh]

The brief discussion about that is here #33834 (review)

[danmoseley]

may be just roughly reverting dotnet/corefx#16704

[danmoseley]

should also delete https://github.com/dotnet/runtime/blob/master/docs/coding-guidelines/pinvoke-checker.md