11905: internal: Remove hir_expand macro recursion check r=jonas-schievink a=jonas-schievink
This check is insufficient to ensure finite macro nesting, and so all callers already have their own recursion limit, which makes this check redundant.
...at least I hope it's redundant. Would be great if someone could double-check this.
Originally, this check was added in https://github.com/rust-analyzer/rust-analyzer/pull/3671
Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>