This file no longer needs to exist after
https://codereview.chromium.org/941433004/ has been landed.

Libyuv never had any LSan suppressions added, so the
file has no purpose.
Also cleanup empty sanitizer_options.gyp file that was added
by mistake.

BUG=
R=fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/35299004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1300 16f28f9a-4ce2-e073-06de-1de4eb20be90