False F401 with annotations and `no_type_check`.

Using v0.8.1.
```python
from collections.abc import Iterable
from typing import no_type_check

@no_type_check
def func(it: Iterable):
    ...
```
outputs
```
.py:1:29: F401 [*] `collections.abc.Iterable` imported but unused
  |
1 | from collections.abc import Iterable
```
