Remove unused module

Author: yinggeh

src/utils/metrics.py

@@ -24,7 +24,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-from typing import Dict, List, Union
+from typing import Dict, Union
 
 import triton_python_backend_utils as pb_utils
 from vllm.engine.metrics import StatLoggerBase as VllmStatLoggerBase