Fix ruff and tests

Author: asmeurer

array_api_compat/cupy/__init__.py

@@ -1,4 +1,4 @@
-from cupy import *
+from cupy import * # noqa: F403
 
 # from cupy import * doesn't overwrite these builtin names
 from cupy import abs, max, min, round # noqa: F401

array_api_compat/cupy/fft.py

@@ -1,4 +1,4 @@
-from cupy.fft import *
+from cupy.fft import * # noqa: F403
 from cupy.fft import __all__ as fft_all
 
 from ..common import _fft

array_api_compat/numpy/fft.py

@@ -1,4 +1,4 @@
-from numpy.fft import *
+from numpy.fft import * # noqa: F403
 from numpy.fft import __all__ as fft_all
 
 from ..common import _fft

array_api_compat/torch/fft.py

@@ -82,3 +82,5 @@ def ifftshift(
     "fftshift",
     "ifftshift",
 ]
+
+_all_ignore = ['torch']