chore: remove unused cancel method from form

ui/core/app/components/form/account/password/set-password/index.hbs

@@ -1,6 +1,5 @@
 <Rose::Form
   @onSubmit={{fn this.submit @submit}}
-  @cancel={{fn this.cancel @cancel}}
   @disabled={{@model.isSaving}}
   @error={{@model.errors.base}}
   as |form|

ui/core/app/components/form/account/password/set-password/index.js

@@ -43,14 +43,4 @@ export default class FormAccountPasswordSetPasswordIndexComponent extends Compon
     next(() => this.resetPassword());
     fn(password);
   }
-
-  /**
-   * Unset password value before callback.
-   * @param {function} fn
-   */
-  @action
-  cancel(fn) {
-    this.resetPassword();
-    fn();
-  }
 }