224 remove bbox crs

[philvarner]

Related Issue(s): #224

Proposed Changes:

1. remove stray mention of bbox-crs in commons openapi defintion description text

PR Checklist:

• This PR is made against the dev branch (all proposed changes except releases should be against dev, not master).
• This PR has no breaking changes.
• This PR does not make any changes to the core spec in the stac-spec directory (these are included as a subtree and should be updated directly in radiantearth/stac-spec)
• I have added my changes to the CHANGELOG or a CHANGELOG entry is not required.

[m-mohr]

Something is wrong here, I can't figure out what the difference is from the huge amount of changes. From base branch?

[philvarner]

Something is wrong here, I can't figure out what the difference is from the huge amount of changes. From base branch?

whenever I make several PRs against this project, I always manage to accidentally make at least 1 against master instead of dev. fixed!

[m-mohr]

We've all been at that point multiple times. ;-)