Docs - Remove the "Manage API Keys and Webhooks programatically" page

[bassgeta]

Problem

Devs get confused how to manage API keys and webhooks.

Solution

Remove the Manage API Keys and Webhooks programatically page from the docs.

History

Old Issue description:

As mentioned in this issue we need to decide if we want to hide the page from the docs, and if we're going to do it, let's open a PR and close this issue.

Opening this for visibility.

[MantisClone]

I lean towards removing it - even though the Gitbook page is more clear and the risk of misunderstanding is lower.
It's OK to push app builders to use the portal to manage their API keys and webhooks.

[MantisClone]

Per meeting today with The Accountant Quits (TAQ), their developer clicked the programmatic page first. WE should remove it.

[MantisClone]

I updated the Title and description.

[MantisClone]

Implemented in 19b3bfa