[sqlite] Remove obsolete reference version 3.8.7.4, p2.

https://codereview.chromium.org/2363173002 attempted this delete.
And, indeed, in the client I submitted from
third_party/sqlite/sqlite-src-3080704/ is gone.  But in a different
client these two files remain:
   ext/fts3/unicode/UnicodeData.txt
   test/randexpr1.test

https://codereview.chromium.org/864343004 suggests that
UnicodeData.txt had to be manually landed in the first place, possibly
because it's greater than 1MB.

AFAICT, randexpr1.test is fine.  chardet suggests it's 100% ASCII.
It is also greater than 1MB, though...

BUG=579743
TBR=michaeln@chromium.org

Review URL: https://codereview.chromium.org/2371463003 .

Cr-Original-Commit-Position: refs/heads/master@{#420787}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: ba0546f0cb7ab59ffc7156958199e72467a58e47
2 files changed