removed deprecated notes on watcloud slurm dev guide

pages/onboarding/asd_watcloud_dev.mdx

@@ -170,13 +170,3 @@ There is no setup. Creating an SLURM job is really easy. It was what SLURM was d
 <Callout type="default" emoji="✏️">
   **Deliverable** Run a SLURM batch job with 2 CPUs that counts to 60.
 </Callout>
-
-If you want to create a slurm job that runs inside a docker container, you can use the following helper script.
-
-```bash
-cd wato_asd_tooling
-bash slurm_templates/custom_job_node.sh
-```
-<Callout type="warning" emoji="⚠️">
-  You need to have access to our docker registry to make this work. You can come back to this when you've learned about docker in the [General Onboarding](/onboarding/asd_general_onboarding)
-</Callout>