Update developer guide

Author: kabilar

src/elements/developer-guide.md

@@ -54,11 +54,3 @@ dependency order. Refer to the workflow's notebook
   ```console
   docker-compose -f ./docker/docker-compose-test.yaml up --build
   ```
-
-## Auxiliary tools
-
-- [DataJoint utilities](https://github.com/datajoint-company/datajoint-utilities) - general-purpose functions/utilities for working with DataJoint pipelines
-  - Text search
-  - Data migration between tables/schemas/servers
-  - DataJoint workers
-- [DataJoint for Julia](https://github.com/datajoint/neuronex_workshop_2018/tree/master/julia) - wrapper library developed in Carlos Brody lab