Ignore scipy.stats._axis_nan_policy.SmallSampleWarning for LaxBackedS…

…cipyStatsTests.testMode

It is to fix our CI, the warning itself started occurring on scipy 1.14

PiperOrigin-RevId: 676966398

tests/scipy_stats_test.py

@@ -1568,6 +1568,10 @@ def evaluate_kde(kde, x):
     contains_nans=[True, False],
     keepdims=[True, False]
   )
+  @jtu.ignore_warning(
+      category=scipy.stats._axis_nan_policy.SmallSampleWarning,
+      message="One or more sample arguments is too small; all returned values will be NaN"
+  )
   def testMode(self, shape, dtype, axis, contains_nans, keepdims):
     if scipy_version < (1, 9, 0) and keepdims != True:
       self.skipTest("scipy < 1.9.0 only support keepdims == True")