This change seemed a good idea at the time. It may well have been a good idea at the time.
Why JSLint (Just About) Made Sense in 2012
jQuery was commonly used as an abstraction on top of browser inconsistencies. This
was hugely beneficial with Internet Explorer 7, 8 and 9 taking around 25% of the browser market
document.querySelector() yet to be formalised as a W3C recommendation.
Why JSLint On Production Code Makes No Sense in 2018
Vanilla (native) JS is commonly used instead of abstraction libraries such as jQuery. Modern browsers support native element finding via CSS selectors. jQuery is no longer essential.