Remove SkDataTable from SkFlattenable hierarchy.

Remove SkDataTable from SkFlattenable hierarchy.

As far as I can tell, we never really needed this.  No code outside the unit
test calls this code.

BUG=

Committed: http://code.google.com/p/skia/source/detail?r=11792

[mtklein, 2013-10-15 19:28:17]

Going to punt moving this to ports back to you.  Not quite sure what's the best
way to do that.  I see it's only used with fontconfig currently, so it could go
alongside that code, but if we put it fully in ports doesn't it become
untestable (or only testable where we build fontconfig)?

[mtklein, 2013-10-15 19:49:18]

CC +sugoi

[sugoi1, 2013-10-15 19:58:11]

On 2013/10/15 19:49:18, mtklein wrote:
> CC +sugoi

lgtm

[reed1, 2013-10-15 20:06:39]

lots of deletes! -- lgtm

[commit-bot: I haz the power, 2013-10-15 20:07:01]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/mtklein@google.com/26223009/1

[commit-bot: I haz the power, 2013-10-15 20:40:00]

Change committed as 11792