[webkit-dev] Removing the ENABLE(CSS_SCROLL_SNAP) flag

[Martin Robinson]

Recently, css-scroll-snap was enabled on all ports. The implementation
has also been extended to be mostly platform-independent. Since all
ports are compiling this code and it's a fairly basic CSS feature should
we go ahead and remove the ENABLE(CSS_SCROLL_SNAP) build flag? I think
this would greatly simplify the scrolling code.

Thanks!

--Martin