The test sets an attribute with key `"remove"` on line 12, then calls `remove_attribute("removed")` on line 13 (note the different key). The assertion on line 24 expects `"remove" not in metric["attributes"]`, but since `"remove"` was set and never removed (only `"removed"` was removed), this assertion will fail. The test likely intended to remove the same key that was set.

The comment on line 50 of api.py explicitly states 'When changing this, update __all__ in __init__.py too'. The PR adds `set_attribute` and `remove_attribute` to api.py's __all__ (lines 73-74) but does not update __init__.py's __all__ list. While the functions are technically accessible via `sentry_sdk.set_attribute()` due to the `from sentry_sdk.api import *` statement, they won't be included when users do `from sentry_sdk import *` because __init__.py's explicit __all__ takes precedence. This creates inconsistent API surface and violates the project's own documented convention.

The test sets an attribute named 'remove' (line 12) but then attempts to remove an attribute named 'removed' (line 13). This typo means the test doesn't actually validate that `remove_attribute` works correctly. The assertion at line 24 expects 'remove' is not in attributes, but since 'remove' was never removed (only the non-existent 'removed' was), this test will fail.

The code adds `set_attribute` and `remove_attribute` to `api.py`'s `__all__` list, but the comment at line 50 explicitly states 'When changing this, update __all__ in __init__.py too'. Looking at `sentry_sdk/__init__.py`, neither function is added to its `__all__` list. While the functions will still be importable (via `from sentry_sdk.api import *`), this violates the project's documented convention and may cause inconsistency in IDE autocompletion and documentation generation.