Skip fft functions in torch

Author: asmeurer

torch-xfails.txt

@@ -193,3 +193,16 @@ array_api_tests/test_operators_and_elementwise_functions.py::test_expm1
 array_api_tests/test_operators_and_elementwise_functions.py::test_round
 array_api_tests/test_set_functions.py::test_unique_counts
 array_api_tests/test_set_functions.py::test_unique_values
+
+# fft functions are not yet supported
+# (https://github.com/data-apis/array-api-compat/issues/67)
+array_api_tests/test_fft.py::test_fftn
+array_api_tests/test_fft.py::test_ifftn
+array_api_tests/test_fft.py::test_rfft
+array_api_tests/test_fft.py::test_irfft
+array_api_tests/test_fft.py::test_rfftn
+array_api_tests/test_fft.py::test_irfftn
+array_api_tests/test_fft.py::test_hfft
+array_api_tests/test_fft.py::test_ihfft
+array_api_tests/test_fft.py::test_shift_func[fftshift]
+array_api_tests/test_fft.py::test_shift_func[ifftshift]