MDEV-4786 merge 10.0-monty -> 10.0

remove unused HA_READ_OUT_OF_SYNC

sql/handler.h

@@ -247,14 +247,6 @@ enum enum_alter_inplace_result {
  */
 #define HA_CAN_FULLTEXT_EXT              (1LL << 44)
 
-/*
-  Storage engine doesn't synchronize result set with expected table contents.
-  Used by replication slave to check if it is possible to retrieve rows from
-  the table when deciding whether to do a full table scan, index scan or hash
-  scan while applying a row event.
- */
-#define HA_READ_OUT_OF_SYNC              (1LL << 45)
-
 /*
   Set of all binlog flags. Currently only contain the capabilities
   flags.