Fix ruff issues

Author: asmeurer

Diff for: array_api_strict/_info.py

@@ -130,7 +130,7 @@ def dtypes(
         if isinstance(kind, tuple):
             res = {}
             for k in kind:
-                res.update(dtypes(kind=k))
+                res.update(self.dtypes(kind=k))
             return res
         raise ValueError(f"unsupported kind: {kind!r}")
 

Diff for: array_api_strict/_typing.py

@@ -21,7 +21,6 @@
 
 from typing import (
     Any,
-    ModuleType,
     TypedDict,
     TypeVar,
     Protocol,

Diff for: array_api_strict/tests/test_flags.py

@@ -3,7 +3,6 @@
 
 from .._flags import (set_array_api_strict_flags, get_array_api_strict_flags,
                       reset_array_api_strict_flags)
-from .._info import __array_namespace_info__
 from .._fft import (fft, ifft, fftn, ifftn, rfft, irfft, rfftn, irfftn, hfft,
                     ihfft, fftfreq, rfftfreq, fftshift, ifftshift)
 from .._linalg import (cholesky, cross, det, diagonal, eigh, eigvalsh, inv,