🚨 fftpack.helper: fix python-version-dependent stubtest error

Author: jorenham

.mypyignore

@@ -9,9 +9,6 @@ scipy\.((_|\w)+\.)+(__test__|test|tests(\..+)?)
 scipy\._lib\.(array_api_compat|array_api_extra|cobyqa).*
 scipy\.fft\._pocketfft\..*
 
-# numpy re-export with wrong annotations on numpy<1.24
-scipy\.fftpack\.(_?helper\.)?fftfreq
-
 # namespace pollution
 scipy\._lib\.decorator\.(DEF|ArgSpec|FunctionMaker|__init__|append|dispatch_on|get_init|getargspec|init|n_args)
 scipy\.stats\._rcont\.rcont

scipy-stubs/fftpack/helper.pyi

@@ -1,20 +1,13 @@
 # This module is not meant for public use and will be removed in SciPy v2.0.0.
-import sys
 from typing import Final
 from typing_extensions import deprecated
 
 __all__ = ["fftfreq", "fftshift", "ifftshift", "next_fast_len", "rfftfreq"]
 
 __MESSAGE: Final = "will be removed in SciPy v2.0.0"
 
-if sys.version_info >= (3, 13):
-    # `device` was added in numpy 2
-    @deprecated(__MESSAGE)
-    def fftfreq(n: object, d: object = ..., device: object = ...) -> object: ...
-else:
-    @deprecated(__MESSAGE)
-    def fftfreq(n: object, d: object = ...) -> object: ...
-
+@deprecated(__MESSAGE)
+def fftfreq(n: object, d: object = ..., device: object = ...) -> object: ...
 @deprecated(__MESSAGE)
 def fftshift(x: object, axes: object = ...) -> object: ...
 @deprecated(__MESSAGE)