Background

In T361589 we moved code relating to templates from Minerva to WikimediaMessages. We now have 2 instances of the CSS which is confusing, so we should remove ASAP.

User story

As a user, I don't want delays in getting night mode updates due to confusion relating to code living in 2 places in production.

Before working on this task

Check that cached pages have cleared to a significant rate and that the new style module is present: https://logstash.wikimedia.org/goto/bdc5fa26c4c69d2a03e15b3fc50a74b6

Acceptance criteria

• The wgMinervaApplyKnownTemplateHacks configuration variable is removed from Minerva
• The Readme.md has been updated.
• References to when (@wgMinervaApplyKnownTemplateHacks = 1) { are removed.
• resources/skins.minerva.base.styles/content/tablet/hacks.less is removed
• resources/skins.minerva.mainPage.styles/hacks.less is removed
• resources/skins.minerva.base.styles/content/hacks.less is removed

QA steps

• Visit https://en.m.wikipedia.beta.wmflabs.org/wiki/The_New_Blue_of_Yale?minervanightmode=1 and resize to mobile
• Make sure the infobox goes full screen
• Make sure no color contrast issues inside the infobox (ignore issues with red links and language button)

Communication criteria - does this need an announcement or discussion?

This will surface T362747 for a small selection of page views from 2nd May.

• There were 76,000 page views impacted with the issue over last hour on Thursday 25th
• On Thursday 18th 1,445,668 page views were impacted.
• This number should be even lower on 2nd May.

We may want to inform communities that if unsatisfied with this situation they can add the following code to MediaWiki:Mobile.js:

mw.loader.using( 'ext.wikimediamessages.styles' )

QA Results - Beta

QA Results - Prod