[numpy] Fix test failures under NumPy 2.2.

PiperOrigin-RevId: 704330083

Author: hawkinsp

tf_keras/constraints_test.py

@@ -99,8 +99,8 @@ def test_min_max_norm(self):
             normed = norm_instance(backend.variable(array))
             value = backend.eval(normed)
             l2 = np.sqrt(np.sum(np.square(value), axis=0))
-            assert not l2[l2 < m]
-            assert not l2[l2 > m * 2 + 1e-5]
+            assert l2[l2 < m].size == 0
+            assert l2[l2 > m * 2 + 1e-5].size == 0
 
     def test_conv2d_radial_constraint(self):
         for width in (3, 4, 5, 6):