[Relay][UnitTest] Removed redundant unit test.

[Lunderberg]

test_op_level2.py::test_conv2d should have been removed in the refactoring in #8947. All functionality tested by it is in test_op_level2.py::TestConv2D.

[masahi]

What about

tvm/tests/python/relay/test_any.py

Line 375 in 6dea994

class TestAnyReduce:

and

tvm/tests/python/relay/test_any.py

Line 435 in 6dea994

def test_any_reduce():

?

[Lunderberg]

That one should also be removed, and I will update the PR. Looks like I didn't find it in my initial search because pytest --collect-only can print in the order of parametrization, not necessarily in file-by-file order. I wrote a quick script to check the output of pytest --collect-only instead of looking over it by hand, and test_any_reduce is the last one in tests/python/relay with this accidental repetition.