Remove hardcoded proxy parameter

home/fhir-validation.ipynb

@@ -429,7 +429,7 @@
    "source": [
     "# Install pip package in the current Jupyter kernel\n",
     "import sys\n",
-    "!{sys.executable} -m pip install pygwalker --proxy http://141.53.65.163:8080/"
+    "!{sys.executable} -m pip install pygwalker"
    ]
   },
   {