delete banchmark flag

Author: Mikel Broström

.github/workflows/benchmark.yml

@@ -90,7 +90,7 @@ jobs:
           ls tracking/val_utils
           ls tracking/val_utils/data
 
-          if python3 tracking/val.py --imgsz 320 --classes 0 --benchmark MOT17-50 --yolo-model yolov8x.pt --reid-model osnet_x1_0_dukemtmcreid.pt --tracking-method ${{ matrix.tracker }} --verbose --source ./tracking/val_utils/data/MOT17-50/train; then
+          if python3 tracking/val.py --imgsz 320 --classes 0 --yolo-model yolov8x.pt --reid-model osnet_x1_0_dukemtmcreid.pt --tracking-method ${{ matrix.tracker }} --verbose --source ./tracking/val_utils/data/MOT17-50/train; then
             STATUS="✅"
           else
             STATUS="❌"