Remove rpl_killed_ddl.test from experimental after fixed BUG#47638

mysql-test/collections/default.experimental

@@ -24,7 +24,6 @@ main.wait_timeout @solaris               # Bug#51244 2010-04-26 alik wait_timeou
 rpl.rpl_heartbeat_basic                  # BUG#54820 2010-06-26 alik rpl.rpl_heartbeat_basic fails sporadically again
 rpl.rpl_heartbeat_2slaves                # BUG#43828 2009-10-22 luis fails sporadically
 rpl.rpl_innodb_bug28430*                 # Bug#46029
-rpl.rpl_killed_ddl @windows              # Bug#47638 2010-01-20 alik The rpl_killed_ddl test fails on Windows
 
 sys_vars.max_sp_recursion_depth_func @solaris # Bug#47791 2010-01-20 alik Several test cases fail on Solaris with error Thread stack overrun
 sys_vars.slow_query_log_func @solaris         # Bug#54819 2010-06-26 alik sys_vars.slow_query_log_func fails sporadically on Solaris 10