Refactor `DeviseOverrides::ConfirmationsController#create`

Editor assessment

The subject names the exact target, the DeviseOverrides confirmations controller create action, which is precise, but 'Refactor <thing>' is the classic contentless form: what was restructured, extracted, or renamed is entirely in the diff. Chore is a defensible type for an internal cleanup, and the backticked path is accurate. No scope, no body, no footers. The trailing pull-request number is conventional. Hygiene is fine. Understandable for Rails developers who know Devise, and thin for everyone else, the acceptable band. What the restructure accomplished is unstated anywhere.