refactor(eval): remove unnecessary exports

Author: Lawhy

docs/evaluation.md

@@ -247,7 +247,8 @@ Override `get_metric_fns()` to customize metrics:
 ```python
 from functools import partial
 
-from strands_env.eval import Evaluator, compute_pass_at_k
+from strands_env.eval import Evaluator
+from strands_env.eval.metrics import compute_pass_at_k
 
 class MyEvaluator(Evaluator):
     benchmark_name = "my-benchmark"

src/strands_env/eval/__init__.py

@@ -12,21 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .aime import AIME2024Evaluator, AIME2025Evaluator, AIMEEvaluator
 from .evaluator import AsyncEnvFactory, EvalSample, Evaluator
-from .metrics import MetricFn, compute_pass_at_k
+from .metrics import MetricFn
 from .registry import get_benchmark, list_benchmarks, register_eval
 
 __all__ = [
-    "AIME2024Evaluator",
-    "AIME2025Evaluator",
-    "AIMEEvaluator",
     "AsyncEnvFactory",
     "EvalSample",
     "Evaluator",
     "MetricFn",
     "get_benchmark",
     "list_benchmarks",
-    "compute_pass_at_k",
     "register_eval",
 ]

tests/unit/test_eval.py

@@ -5,7 +5,8 @@
 import pytest
 
 from strands_env.core import Action, Environment, Observation, RewardResult, StepResult, TaskContext
-from strands_env.eval import AIME2024Evaluator, EvalSample, Evaluator
+from strands_env.eval import EvalSample, Evaluator
+from strands_env.eval.aime import AIME2024Evaluator
 from strands_env.eval.metrics import compute_pass_at_k
 
 # ---------------------------------------------------------------------------