fixup of "Make error messages from DROP TABLE and DROP TABLE IF EXISTS consistent" results

mysql-test/suite/engines/iuds/r/strings_update_delete.result

@@ -70472,17 +70472,4 @@ SIZE
 DROP TABLE t17,t18;
 DROP TABLE IF EXISTS t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16,t17,t18;
 Warnings:
-Note	1051	Unknown table 'test.t3'
-Note	1051	Unknown table 'test.t4'
-Note	1051	Unknown table 'test.t5'
-Note	1051	Unknown table 'test.t6'
-Note	1051	Unknown table 'test.t7'
-Note	1051	Unknown table 'test.t8'
-Note	1051	Unknown table 'test.t9'
-Note	1051	Unknown table 'test.t10'
-Note	1051	Unknown table 'test.t11'
-Note	1051	Unknown table 'test.t13'
-Note	1051	Unknown table 'test.t14'
-Note	1051	Unknown table 'test.t15'
-Note	1051	Unknown table 'test.t17'
-Note	1051	Unknown table 'test.t18'
+Note	1051	Unknown table 'test.t3,test.t4,test.t5,test.t6,test.t7,test.t8,test.t9,test.t10,test.t11,test.t13,test.t14,test....'