Emmet extension still partially relies on core functionality

<!-- ⚠️⚠️ Do Not Delete This! bug_report_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Also please test using the latest insiders build to make sure your issue has not already been fixed: https://code.visualstudio.com/insiders/ --> <!-- Use Help > Report Issue to prefill these. --> After #58600 is fixed, there is still the issue that part of the Emmet codebase relies on core functionality, rather than only on what is available within the VS Code API. <!-- Launch with `code --disable-extensions` to check. --> Does this issue occur when all extensions are disabled?: N/A