Remove headers from gni source lists

Change-Id: Ic5542d3304ef0673e899d8a21c7bf470f7e2dad6
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/211599
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
1 file changed