Revert "no install if exists (#781)"

This reverts commit 7b07a8b.

Author: Yuchen Xu

modules/resample_benchmark.ipynb

@@ -31,7 +31,7 @@
    "outputs": [],
    "source": [
     "!pip install -q ipywidgets==7.6\n",
-    "!python -c \"import monai\" || pip install -q \"monai-weekly[nibabel]\"\n",
+    "!pip install -q \"monai-weekly[nibabel]\"\n",
     "import monai\n",
     "from monai.apps.utils import download_url\n",
     "\n",

runner.sh

@@ -312,7 +312,7 @@ for file in "${files[@]}"; do
 			replace_text
 		done
 
-		python -c 'import monai; monai.config.print_config()'
+		# echo "$notebook" > "${base_path}/debug_notebook.ipynb"
 		time out=$(echo "$notebook" | papermill --progress-bar -k "$kernelspec")
 		success=$?
 	    if [[ ${success} -ne 0 || "$out" =~ "\"status\": \"failed\"" ]]; then