Revert "Update status on CVE-2019-19242/sqlite3"

The issue is actually about misshandling pExpr->y.pTab, in
sqlite3ExprCodeTarget in expr.c . Whilst the issue was triggerable in
the 'generated column' case it's not assured that there is no issue in
previous version.

To play on safe side rather continue to mark it accordingly as affected
where in expr.c in sqlite3ExprCodeTarget pExpr->y.pTab is not checked.
This is at least the case for the 3.30.1-1 version which was in unstable
at some point.

This reverts commit 93af29d7.