Removing old CG shadow code.
        
A CG-specific shadow offset hack was added in http://trac.webkit.org/changeset/34317
for this particular setShadow method. However, this shadow offset adjustment for CG
has since moved down into platform specific code. Thus, this offset adjustment here
is now redundant.

The CG-only shadow setting code block in this setShadow method is now redundant.
Since it sets the shadow values to the CGContext directly - and not to the State object -
it will be overwritten later by any subsequent calls to setting shadow values such as
blur, offset, or shadow color.

Reviewed by Simon Fraser.

No new tests. Current canvas tests cover this path.

* html/canvas/CanvasRenderingContext2D.cpp:
(WebCore::CanvasRenderingContext2D::setShadow):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106988 268f45cc-cd09-0410-ab3c-d52691b4dbfc