This reverts commit 5d576d05b4.
Reason for revert: Using Skin::getTemplateData method outside the
skin rendering layer is dangerous and likely a performance issue as
it means generating the rendering data twice and makes various hooks
execute multiple times.
It has caused T326538 and may be causing other issues.
Bug: T326538
Change-Id: Ie5d079deae414eb199d2a40b98d04b57439eaac4