bug: remove unused sys import

Signed-off-by: Andrey Fedorov <andrey.fedorov@gmail.com>

Author: fedorov

modules/idc_dataset.ipynb

@@ -43,7 +43,7 @@
     "outputId": "f63082ca-81d8-4b02-8de0-662710f6e508"
    },
    "outputs": [],
-   "source": "import os\nimport sys\nimport tempfile\nfrom pathlib import Path\nfrom typing import Hashable, Mapping\n\nimport itkwasm_dicom\nimport matplotlib.pyplot as plt\nimport numpy as np\nimport torch\nfrom idc_index import IDCClient\nfrom matplotlib.colors import ListedColormap\n\nimport monai\nfrom monai.config import KeysCollection\nfrom monai.data import Dataset, MetaTensor\nfrom monai.data.image_reader import ITKReader\nfrom monai.transforms import (\n    Compose,\n    EnsureChannelFirstd,\n    LoadImaged,\n    MapTransform,\n    Orientationd,\n    ScaleIntensityRanged,\n    Spacingd,\n)\n\nmonai.config.print_config()"
+   "source": "import os\nimport tempfile\nfrom pathlib import Path\nfrom typing import Hashable, Mapping\n\nimport itkwasm_dicom\nimport matplotlib.pyplot as plt\nimport numpy as np\nimport torch\nfrom idc_index import IDCClient\nfrom matplotlib.colors import ListedColormap\n\nimport monai\nfrom monai.config import KeysCollection\nfrom monai.data import Dataset, MetaTensor\nfrom monai.data.image_reader import ITKReader\nfrom monai.transforms import (\n    Compose,\n    EnsureChannelFirstd,\n    LoadImaged,\n    MapTransform,\n    Orientationd,\n    ScaleIntensityRanged,\n    Spacingd,\n)\n\nmonai.config.print_config()"
   },
   {
    "cell_type": "markdown",