tests adaptation for 5.7

localtests/json57/create.sql

@@ -1,21 +0,0 @@
-drop table if exists gh_ost_test;
-create table gh_ost_test (
-  id int auto_increment,
-  j json,
-  primary key(id)
-) auto_increment=1;
-
-drop event if exists gh_ost_test;
-delimiter ;;
-create event gh_ost_test
-  on schedule every 1 second
-  starts current_timestamp
-  ends current_timestamp + interval 60 second
-  on completion not preserve
-  enable
-  do
-begin
-  insert into gh_ost_test values (null, '"sometext"');
-  insert into gh_ost_test values (null, '{"key":"val"}');
-  insert into gh_ost_test values (null, '{"is-it": true, "count": 3, "elements": []}');
-end ;;