Stop codecov from posting messages

[anntzer]

See https://docs.codecov.io/docs/pull-request-comments-1#section-disable-comment and https://docs.codecov.io/docs/codecov-yaml#section-can-i-name-the-file-codecov-yml-

Also remove travis helper scripts unused since #6568.

[QuLogic]

According to the FAQ on the second page, it can be anywhere, so maybe put it in ci/codecov.yml instead of cluttering up the root.

[anntzer]

Good idea.

[codecov-io]

Current coverage is 62.18% (diff: 100%)

Merging #7926 into master will not change coverage

@@             master      #7926   diff @@
==========================================
  Files           175        175          
  Lines         56125      56125          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
  Hits          34901      34901          
  Misses        21224      21224          
  Partials          0          0          

Powered by Codecov. Last update c93142f...8721e7c

[QuLogic]

Err, I hope that's because the file's not on master yet.

[anntzer]

"lol"
(I have no idea, just following the docs... in any case this should be the coverage for the first version, where .codecov.yml was still in root. Let's see what happens now.)

[Carreau]

I would strongly recommend the codecov browser extension which show the coverage diff directly in GitHub UI. Also it's strange you get coverall commit status but not codecov.

[anntzer]

That is a neat extension!

[Carreau]

That is a neat extension!

Yeah, I have the not-so-secret wish to have time to write one for vim to highlight the coverage of most recent commit in my gutter.

[QuLogic]

I think codecov is waiting for appveyor; it only posted before because @anntzer force-pushed which triggered an auto-cancel on appveyor.

[QuLogic]

Fingers crossed this works in the future.