remove unused import

Author: nvaytet

docs/user-guide/dream/workflow-widget-dream.ipynb

@@ -46,7 +46,7 @@
    },
    "outputs": [],
    "source": [
-    "from ess.powder.types import DspacingBins, Filename, MonitorFilename, SampleRun, VanadiumRun\n",
+    "from ess.powder.types import DspacingBins, Filename, SampleRun, VanadiumRun\n",
     "import ess.dream.data  # noqa: F401\n",
     "\n",
     "select = widget.children[0].children[0]\n",