Remove unused dependencies

[gadomski]

Related Issue(s): Brought to my attention by a note in https://github.com/conda-forge/stactools-feedstock/pull/10. No changlog necessary.

PR checklist:

• [x] Code is formatted (run scripts/format).
• [x] Code lints properly (run scripts/lint).
• [x] Tests pass (run scripts/test).
• [ ] Documentation has been updated to reflect changes, if applicable.
• [ ] Changes are added to the CHANGELOG.

[gadomski]

Whelp, turns out they were implicit dependencies of fsspec closing.

[jsignell]

It looks like you could use It looks like you could use fsspec[http]>=2021.7 to pull in the extra requirements if you like

[gadomski]

That's much nicer, I'll re-open w/ that. Thank you!