Anti-patch. This patch undoes the previously pushed patch. It is 
null-merged in versions 5.1 and above since there the original 
patch is still desired.


mysql-test/r/delete.result:
  Bug#30234: Anti-patch
mysql-test/t/delete.test:
  Bug#30234: Anti-patch
sql/sql_yacc.yy:
  Bug#30234: Anti-patch