The previous patch in this series converted all uses of mapped attributes
for animation to be animated as CSS properties (that is, to be treated
as presentation hints in the cascade).
As result, we no longer need the SVG Animation presentation hints level
of the cascade, the corresponding rule processor(SVGAttrAnimationRuleProcessor),
or the corresponding eRestyle_SVGAttrAnimations restyle hint. So this patch
removes these unused rule processor and restyle hint.
MozReview-Commit-ID: Hm8IDaqc3ym
--HG--
extra : rebase_source : 339ad209f37ea84857577001c7385323f2187d46