Remove duplicates

[tekrei]

• [] Added a change log entry in changelog.d/<directory>/.
• Added self to copyright blurb of touched files.
• Added self to AUTHORS.rst.
• Wrote tests.
• Documented my changes in docs/man/ or elsewhere.
• My changes do not contradict
  the current specification.
• I agree to license my contribution under the licenses indicated in the
  changed files.

[evelikov]

Fwiw I've sorted and de-duplicated the authors file with #1076. Happy to split to a separate PR, etc.

[carmenbianca]

Hi! Thanks @tekrei. I've cleaned this up a little more. The list is sorted by number of commits at time of the creation of that list, but I evidently didn't clean it up well enough. I don't really want to do the labour of keeping that list sorted henceforth (alphabetically or otherwise), so @evelikov if you could remove the commit touching AUTHORS.rst, I'd be thankful.

[evelikov]

Food for thought:

Would it make sense to move the authors to separate file and add 2 lines to the releasing script to generates it. Thus ensuring it's in the correct format, the authors themselves don't need to bother and no more duplicates?

/me quickly ducks and goes to update his PR