Remove duplicate entry in harfbuzz GN file

Bug: skia:
Change-Id: Ia2913ceb3ecaa88fb43b2143f8ba89b86d0f7173
Reviewed-on: https://skia-review.googlesource.com/c/190225
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed