chore: update roadmap content json (#6711)

Co-authored-by: kamranahmedse <kamranahmedse@users.noreply.github.com>

public/roadmap-content/python.json

@@ -58,11 +58,6 @@
         "title": "Python for Beginners: Data Types",
         "url": "https://thenewstack.io/python-for-beginners-data-types/",
         "type": "article"
-      },
-      {
-        "title": "Python Variables - Python Tutorial for Beginners with Examples | Mosh",
-        "url": "https://www.youtube.com/watch?v=cQT33yu9pY8",
-        "type": "video"
       }
     ]
   },