Upgrade from v2.0.0.beta10 +37 to 2.1.0.beta1 does fail

Not that it is causing problems, but it might be and it is no longer needed, so you can comment out / remove that line

GitHub - discourse/discourse-tagging: Tagging functionality for Discourse Forums

No longer needed

Tagging was introduced into Core in April of 2016. If you are using Discourse 1.6.0.beta2 or later, you do not need this plugin.

See this post for more information.