Potential fix for code scanning alert no. 964: Unused import

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: richardhuo-nv

qa/L0_backend_python/decoupled/models/decoupled_bls_async_cancel/1/model.py

@@ -23,7 +23,6 @@
 # OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-import asyncio
 
 import numpy as np
 import triton_python_backend_utils as pb_utils