081622: remove broken link (#392)

Author: Chris Cho

source/fundamentals/crud.txt

@@ -36,6 +36,4 @@ to learn more about these hybrid methods.
    - Learn how to apply `CRUD Operations <https://developer.mongodb.com/quickstart/node-crud-tutorial>`__
      with an example scenario.
    - Analyze data in MongoDB Atlas using the `Aggregation Pipeline <https://developer.mongodb.com/quickstart/node-aggregation-framework>`__.
-   - Learn how to perform `Transactions <https://developer.mongodb.com/quickstart/node-transactions>`__
-     with an example scenario.