### Bug description

This line of code seems to be responsible:

https://github.com/quarto-dev/quarto-cli/blob/5e255aaab9f091a66b4ab6da3d63f0812fe38f70/src/project/types/website/listing/website-listing-read.ts#L997

The listing renders just as `.qmd` files do, so perhaps the warning isn't needed?

### Checklist

- [ ] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [ ] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [ ] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [ ] Please document the operating system you're running. If on Linux, please provide the specific distribution.
- [ ] Please provide the output of `quarto check` so we know which version of quarto and its dependencies you're running.
dragonstyle
2023-04-20T10:52:19Z
seeM
bug
v1.3
closed
`.ipynb` files in listings always warn that they `contain no metadata`
https://github.com/quarto-dev/quarto-cli/issues/5252