Remove removed PHPCS rule

[szepeviktor]

to fix CI

was https://travis-ci.org/Automattic/_s/jobs/492470379#L600

[szepeviktor]

much better: https://travis-ci.org/Automattic/_s/jobs/586252288#L620-L663
now there are only small style errors

[szepeviktor]

@crunnells Automattic decided to halt _s developement?

[jrfnl]

@szepeviktor Please see #1311

Regarding the specific sniff: the sniff has not been removed, but has been renamed. Though instead of updating the name in the ruleset, it would be better to switch to PHPCompatibilityWP instead (which is what is done in #1311, though that PR is very out of date and I have little motivation to update it as PRs in this repo are being left to rot instead of being merged).

[Ismail-elkorchi]

@szepeviktor Thank you for the PR and for your willingness to contribute to this project. As Juliette said, the changes regarding this sniff must be done in #1311. So I'm going to close this PR.

@jrfnl If you have the time, the motivation and the energy to update #1311, I'd be willing to review it and then merge it promptly.

[szepeviktor]

Thank you.

[jrfnl]

@Ismail-elkorchi Working on WPCS 3.0 for the moment, let's update that PR after the that's done so it is ready for the future.

[Ismail-elkorchi]

@jrfnl That's really awesome. Thank you for your great work.