revert of hiding of the error exposed by this suite.

mysql-test/r/ctype_gbk_binlog.result

@@ -14,7 +14,6 @@ SET @`tcontent`:=_binary 0x50434B000900000000000000E9000000 COLLATE `binary`/*!*
 CALL p1(@`tcontent`);
 FLUSH LOGS;
 DROP PROCEDURE p1;
-DROP TABLE IF EXISTS t2;
 RENAME TABLE t1 to t2;
 SELECT hex(f1) FROM t2;
 hex(f1)

mysql-test/t/ctype_gbk_binlog.test

@@ -24,9 +24,6 @@ CALL p1(@`tcontent`);
 
 FLUSH LOGS;
 DROP PROCEDURE p1;
---disable_warnings
-DROP TABLE IF EXISTS t2;
---enable_warnings
 RENAME TABLE t1 to t2;
 
 let $MYSQLD_DATADIR= `select @@datadir`;