ruff

9ce3230a - [ty] Make implicit submodule imports only occur in global scope (#21370)

[ty] Make implicit submodule imports only occur in global scope (#21370) This loses any ability to have "per-function" implicit submodule imports, to avoid the "ok but now we need per-scope imports" and "ok but this should actually introduce a global that only exists during this function" problems. A simple and clean implementation with no weird corners. Fixes https://github.com/astral-sh/ty/issues/1482