Remove synchronous image hit test tests

Remove synchronous image hit test tests

Doing synchronous hit test of an image requires copying that SKIA bitmap between
renderer process and browser process and now making that copy causes crashes and
is disabled, so this functionality doesn't work and we're removing that check
because synchronous hit tests are deprecated.

Bug: http://107.108.218.239/bugzilla/show_bug.cgi?id=9525
Reviewed by: Janusz Majnert, Piotr Tworek

Change-Id: Ifc96fee18534bfb21f359df0b25305c53ac7f8f1
Signed-off-by: Tomasz Czekala <t.czekala@partner.samsung.com>