test(aggregation): Remove test_equivalence_mean in CAGrad (#278)

Author: PierreQuinton

tests/unit/aggregation/test_cagrad.py

@@ -1,13 +1,10 @@
 from contextlib import nullcontext as does_not_raise
 
 from pytest import mark, raises
-from torch import Tensor
-from torch.testing import assert_close
 from unit._utils import ExceptionContext
 
-from torchjd.aggregation import CAGrad, Mean
+from torchjd.aggregation import CAGrad
 
-from ._inputs import typical_matrices
 from ._property_testers import ExpectedStructureProperty, NonConflictingProperty
 
 
@@ -23,19 +20,6 @@ class TestCAGradNonConflicting(NonConflictingProperty):
     pass
 
 
-@mark.parametrize("matrix", typical_matrices)
-def test_equivalence_mean(matrix: Tensor):
-    """Tests that CAGrad is equivalent to Mean when c=0."""
-
-    ca_grad = CAGrad(c=0.0)
-    mean = Mean()
-
-    result = ca_grad(matrix)
-    expected = mean(matrix)
-
-    assert_close(result, expected, atol=2e-1, rtol=0)
-
-
 @mark.parametrize(
     ["c", "expectation"],
     [