Remove src:sqlite3 associationg with CVE-2018-18344

CVE-2018-18344 reads as Inappropriate implementation in Extensions.
Reported by Jann Horn of Google Project Zero on 2018-07-23 and there is
no more public information available for it.

OTOH, there is yet an CVE-usassigned further down in the list in
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html
which need identification:

 > [$TBD][900910] High To be allocated: Multiple issues in SQLite via
 > WebSQL. Reported by Wenxiang Qian of Tencent Blade Team on 2018-11-01