chore: remove no-implicit-this lint errors

[matthewhartstonge]

🎉

Fixes https://github.com/adopted-ember-addons/ember-paper/issues/1286

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[github-actions[bot]]

Some tests with 'continue-on-error: true' have failed:

• ember-beta

  • embroider-safe
  • ember-release
  • embroider-optimized
  • ember-canary

  Created by continue-on-error-comment