chore(docs): remove incorrect customer redirect in azure docker

Author: Jacob Pleiness

docs/admin/deploy/docker-compose/azure.mdx

@@ -1,7 +1,5 @@
 # Install Sourcegraph on Azure
 
-> ⚠️ We recommend new users use our [machine image](/admin/deploy/machine-images/) or [script-install](/admin/deploy/single-node/script) instructions, which are easier and offer more flexibility when configuring Sourcegraph. Existing customers can reach out to our Customer Engineering team support@sourcegraph.com if they wish to migrate to these deployment models.
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 This guide will take you through how to set up a Sourcegraph instance on an Azure virtual machine with [Docker Compose](https://docs.docker.com/compose/).