DOC: Update outdated caveats for Anaconda and HTML parsing (#9032)
 - [x] closes #9032



## [Current coverage](https://codecov.io/gh/pandas-dev/pandas/pull/14739?src=pr) is 85.21% (diff: 100%)


> No coverage report found for **master** at d8e427b.

> Powered by [Codecov](https://codecov.io?src=pr). Last update [d8e427b...3e1cdb7](https://codecov.io/gh/pandas-dev/pandas/compare/d8e427bda07fc350dfa327df43b790697e733747...3e1cdb76adce04f454506111ed5dec74e4cccd34?src=pr) True. I personally haven't had installation issues with those packages with anaconda. Should be okay to delete this section.  Thanks for the catch @jorisvandenbossche. Accidentally deleted those. Looks like Anaconda isn't referenced anywhere else on that page.   @mroeschke Thanks!