Merge pull request cupy#8060 from asi1024/rm-vectorstrength-xfail

Remove some `signal.vectorstrength` xfail tests

tests/cupyx_tests/scipy_tests/signal_tests/test_spectral.py

@@ -1,5 +1,3 @@
-
-import sys
 import pytest
 
 import numpy as np
@@ -1297,13 +1295,7 @@ def test_partial_2dperiod(self, xp, scp):
         strength, phase = scp.signal.vectorstrength(events, period)
         return strength, phase
 
-    @pytest.mark.xfail(
-        condition=(
-            sys.platform == 'linux' and
-            not (11030 <= runtime.runtimeGetVersion() < 11040 and
-                 testing.installed('scipy==1.8.*'))
-        ),
-        reason='It fails in the CI')
+    @testing.with_requires('scipy>1.11')
     @testing.numpy_cupy_allclose(scipy_name='scp', rtol=1e-7, atol=1e-7)
     def test_opposite_1dperiod(self, xp, scp):
         events = xp.array([0, .25, .5, .75])
@@ -1312,13 +1304,7 @@ def test_opposite_1dperiod(self, xp, scp):
         strength, phase = scp.signal.vectorstrength(events, period)
         return strength, phase
 
-    @pytest.mark.xfail(
-        condition=(
-            sys.platform == 'linux' and
-            not (11030 <= runtime.runtimeGetVersion() < 11040 and
-                 testing.installed('scipy==1.8.*'))
-        ),
-        reason='It fails in the CI')
+    @testing.with_requires('scipy>1.11')
     @testing.numpy_cupy_allclose(scipy_name='scp', rtol=1e-7, atol=1e-7)
     def test_opposite_2dperiod(self, xp, scp):
         events = xp.array([0, .25, .5, .75])