Removes deleted files SkBitmapShader* from gyp/core.gypi.

BUG=skia:
NOTRY=true
R=robertphillips@google.com
TBR=robertphillips@google.com

Author: bensong@google.com

Review URL: https://codereview.chromium.org/228513003

git-svn-id: http://skia.googlecode.com/svn/trunk@14088 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed