Remove flaky Evo2 dataset performance test (#14371)

* Less stringent timing threshold for dataset performance test

Signed-off-by: John St John <[email protected]>

* Remove timing test from the dataset test suite

Signed-off-by: John St John <[email protected]>

---------

Signed-off-by: John St John <[email protected]>

Author: jstjohn

tests/collections/llm/gpt/data/megatron/hyena/test_evo2_dataset.py

@@ -1045,13 +1045,6 @@ def benchmark_phylo_tag_masking(num_iterations: int = 1000) -> tuple[float, floa
     return old_time, new_time
 
 
-def test_phylo_tag_masking_speed():
-    num_iterations = 2000
-    old_time, new_time = benchmark_phylo_tag_masking(num_iterations=num_iterations)
-    # Assert performance equivalent to within 20% or better on a small example.
-    assert old_time / num_iterations > (new_time / num_iterations) * 0.8
-
-
 if __name__ == "__main__":
     num_iterations = 2000
     old_time, new_time = benchmark_phylo_tag_masking(num_iterations=num_iterations)