Merge #10353

10353: Remove `GenericParams::new` r=SkiFire13 a=SkiFire13

Helps with #10305

I made the implementations of `HasChildSource<_>` and `ChildBySource` for `GenericDefId` use their own logic instead of relying on `GenericParams::new`. This in turn means that `GenericParams::new` is unused and can be removed. `SourceMap` becomes also unused because all the rest of the code does is insert into it, so it can be removed too. 

This also helps avoid creating a completly new `GenericParams` when `GenericDefId::child_source` and `GenericDefId::child_by_source_to` are called, and also creating a `SourceMap` in `item_tree::lower::Ctx::lower_generic_params`.

Co-authored-by: Giacomo Stevanato <giaco.stevanato@gmail.com>

0 files changed, 0 insertions, 0 deletions