This reverts commit a3ca2c3e16.
Reason for revert: This requires wider discussion before moving
forward, and a more complete implementation even once we do have
consensus.
No associated task exists on which to view or continue this
discussion: linked task briefly mentions Mustache in general as an
option as part of a much wider topic, but doesn't concern this
specifically.
Issues that should be discussed include:
* What the intent even is here: is this for one skin only? Is this
the intended path forward for all of them? Depending on which, we
have other issues: for the former case, that it is quite
unhelpful in terms of maintenance and further development having
more random code diversity out there, especially in this
half-completed state; or if it is indeed intended for all of them,
that an RfC is needed before anything is merged, as that is a very
significant change.
* That using Mustache in MediaWiki does add (usually minor)
performance overhead; we need to clearly establish in the task that
this is indeed worth it here.
Change-Id: I0bafa55b554aa8a38553e20c75859ec5eec2c062
