remove SkScalarCompare type and header

BUG=
R=fmalita@chromium.org

Review URL: https://codereview.chromium.org/113193004

git-svn-id: http://skia.googlecode.com/svn/trunk@12681 2bbb7eff-a529-9590-31e7-b0007b416f81
6 files changed