Revert "Don't consider strings with variables to be static"
Summary:
Fixes T8379. This is causing some issues with linter rules so maybe this should just wait until T8049.
This reverts commit a9e581f6488fd7db83d4c02edee64db9b1cd3ef9.
Test Plan: N/A
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T8379
Differential Revision: https://secure.phabricator.com/D13113