Remove $docsify deprecation warning for v5 release

[paulhibbitts]

Description

A deprecation warning for the global $docsify config variable is currently showing in the latest v5 preview:

DEPRECATION: The global $docsify config variable is deprecated. See the latest getting started docs. https://docsify.js.org/#/quickstart

Expected behavior

We should remove this warning for now since we're not ready to deprecate it yet in v5. From what I understand this is such a widely-used part of Docsify that it would affect many plugins and user setups, so it would be essential to have more discussion about the timing and migration strategy before introducing any type of deprecation notice.

Actual behavior

Message is being displayed.

Steps to reproduce

1. View https://preview.docsifyjs.org/#/
2. Open Browser console

Environment

No response

Additional Information

• Bug still occurs when all/other plugins are disabled?