Four small cleanups, no semantic change. Workspace is now clippy-
clean (default lints):
- ailang-check: collapse `if-same-then-else` for primitive vs ADT
type lookup into one branch via a local boolean.
- ailang-codegen: iterate `all_strings.values()` directly instead of
`for (_mname, entries) in &all_strings`.
- ailang-codegen: drop `import_map` parameter from `collect_captures`
— was threaded speculatively through every recursive call but
never read.
- ailang-codegen: `s.len()` instead of `s.as_bytes().len()` in
c_byte_len (the warning predates Iter 6).
Tests: 52 still green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Brummel
b357a1dc4a