Removes support for amber deploy

[faustinoaq]

Description of the Change

This PR removes support for amber deploy because it can be an external shard and we use raw tools (docker-machine, heroku cli) to deploy to production.

Another reason is that amber deploy may be too complex to maintain because providers and developers have different ways to do production deployments (size, resources, accounts, keys, auth, etc)

New deploy guides are already WIP, please, see: https://amberframework.gitbook.io/amber/deployments

Alternate Designs

No

Benefits

Fixes #767
Fixes #768
Fixes #769

Possible Drawbacks

No (DO was already broken) 😅

[eliasjpr]

We have to remove from docs and Readme file as well, I believe also the default command has reference to this.

I guess you can search for the deploy keyword in the source code

Dismissing until you can confirm that we have removed all references

[faustinoaq]

@eliasjpr I already searched the keywork "deploy" across all amber source code and I just found this file 😅

Also I added a warning on amber documentation, see: https://docs.amberframework.org/amber/cli/deploy

[gokul-hashlearn]

"New deploy guides are already WIP, please, see: https://amberframework.gitbook.io/amber/deployments"
The above URL is a 404.

[faustinoaq]

@gokul-hashlearn Yeah, we just added a custom domain, please see: https://docs.amberframework.org/amber/deployment 👍