This was added in 381499a675 in response to the issue that when a skin
adopts a feature that was new in MW 1.36, it caused an exception when
that version of the skin is then installed on MW 1.35. That's expected,
and generally helpful because the default support policy requires
like-for-like (MW 1.35 with REL1_35, this applies to all skins and
extensions, except for a few like Translate and SemanticMediaWiki).
However, while supporting LTS within master is unusual, there are
indeed the Translate/SemanticMediaWiki projects, and this problem has
already been solved years ago there by using a conditional with
$wgVersion. The proposed approach on T271441 actually also involves
such a conditional, but late at runtime instead of in the module
definition. Anyway, the way it was fixed in Timeless already solves
the problem by not passing down the invalid feature in the first
place, thus making the 381499a675 patch obsolete. I'm not aware of
any skin in Gerrit having such a compat policy, but if they exist,
they can fix it the same way, by defining the module in code with
a condition, just as Translate/SemanticMediaWiki do.
Bug: T271441
Change-Id: If97b3d04ac1e3355ee4f229db11e524d24ebd27a
0be2e83ef4