Remove Tweet utils.

[ruebot]

GitHub issue(s):

• Resolves Remove Twitter/tweet analysis #322
• Resolves TweetUtilsTest.scala doesn't test Spark, only underlying json4s library #206
• Resolves More complete Twitter Ingestion #194

What does this Pull Request do?

Remove all Tweet analysis functionality.

How should this be tested?

• TravisCI

Additional Notes:

Need to remove documentation on archivesunleashed.org for next release.

[codecov-io]

Codecov Report

Merging #323 into master will decrease coverage by 1.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #323      +/-   ##
==========================================
- Coverage   75.95%   74.84%   -1.12%     
==========================================
  Files          41       39       -2     
  Lines        1148     1117      -31     
  Branches      200      197       -3     
==========================================
- Hits          872      836      -36     
- Misses        209      215       +6     
+ Partials       67       66       -1

Impacted Files	Coverage Δ
src/main/scala/io/archivesunleashed/package.scala	84.54% <ø> (-0.28%)	⬇️
...archivesunleashed/matchbox/ExtractAtMentions.scala	0% <0%> (-100%)	⬇️
...la/io/archivesunleashed/matchbox/ExtractUrls.scala	0% <0%> (-100%)	⬇️

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[ianmilligan1]

Will test today or tomorrow, and I can stage the archivesunleashed.org PR as well.

[ianmilligan1]

Builds nicely and I think, as noted in #322, this makes sense for the future of the AUT. Approved on my end.

That said, looking forward to hearing @lintool's thoughts as I know he's used these in the past.

[ruebot]

@lintool can you hit the button?