[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/tkt2643.test

-# 2007 Sep 12
-#
-# The author disclaims copyright to this source code. In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#***********************************************************************
-#
-# This file is to test that ticket #2643 has been fixed.
-#
-# $Id: tkt2643.test,v 1.1 2007/09/13 17:54:41 drh Exp $
-#
-
-# The problem in ticket #2643 has to do with the query optimizer
-# making bad assumptions about index cost when data from ANALYZE
-# is available.
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-
-do_test tkt2643-1.1 {
-  execsql {
-    CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE, c);
-    INSERT INTO t1 VALUES(1,2,3);
-    INSERT INTO t1 VALUES(2,3,4);
-    ANALYZE;
-  }
-  db close
-  sqlite3 db test.db
-  execsql {
-    CREATE INDEX i1 ON t1(c);
-    SELECT count(*) FROM t1 WHERE c IS NOT NULL
-  }
-} {2}
-
-finish_test