Add hardware checks to notebook_init() (#5919)

* Update notebook

* Update notebook

* update string

* update string

* Updates

* Updates

* Updates

* check both ipython and psutil

* remove sample_data if is_colab

* cleanup

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tutorial.ipynb

@@ -409,6 +409,7 @@
         "%cd yolov5\n",
         "%pip install -qr requirements.txt  # install\n",
         "\n",
+        "import torch\n",
         "from yolov5 import utils\n",
         "display = utils.notebook_init()  # checks"
       ],
@@ -983,7 +984,7 @@
       "source": [
         "# Reproduce\n",
         "for x in 'yolov5s', 'yolov5m', 'yolov5l', 'yolov5x':\n",
-        "  !python val.py --weights {x}.pt --data coco.yaml --img 640 --conf 0.25 --iou 0.45  # speed\n",
+        "  !python val.py --weights {x}.pt --data coco.yaml --img 640 --task speed  # speed\n",
         "  !python val.py --weights {x}.pt --data coco.yaml --img 640 --conf 0.001 --iou 0.65  # mAP"
       ],
       "execution_count": null,