[SVG] Remove SVGAnimatedPropertyMacros.h

These C macros are for the old SVGAnimatedProperty implementation.
We introduced new animated property implementation in crbug.com/308818 , so they are no longer used.

BUG=349370
NOTRY=true

Review URL: https://codereview.chromium.org/177703004

git-svn-id: svn://svn.chromium.org/blink/trunk@168613 bbb929c8-8fbe-4397-9dbb-9b2b20218538