[td-255] fix error in sim script.

tests/script/general/parser/where.sim

@@ -362,6 +362,7 @@ if $rows != 5 then
 endi
 
 print ======================>td-11169
+sql drop table where_ts;
 sql create stable m1 (ts timestamp , k int) tags(a binary(15000));
 sql create table tm0 using m1 tags('abc');
 sql insert into tm0  values(now, 1);