Remove pdf.gni from source lists.  Android translator barfs.

TBR=djsollen@google.com

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3974

Change-Id: Id3769fc5f0a3b97aa39a664d62095bde1599df6e
Reviewed-on: https://skia-review.googlesource.com/3974
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
1 file changed