Bug #17701, ALTER TABLE t1 ADD PARTITION for PARTITION BY LIST hangs test

- code wrongly tries to do a "fast alter partition", although not supported

sql/sql_partition.h

@@ -24,35 +24,6 @@
 #define HA_CAN_PARTITION_UNIQUE (1 << 2)
 #define HA_USE_AUTO_PARTITION (1 << 3)
 
-/*
-  HA_PARTITION_FUNCTION_SUPPORTED indicates that the function is
-  supported at all.
-  HA_FAST_CHANGE_PARTITION means that optimised variants of the changes
-  exists but they are not necessarily done online.
-
-  HA_ONLINE_DOUBLE_WRITE means that the handler supports writing to both
-  the new partition and to the old partitions when updating through the
-  old partitioning schema while performing a change of the partitioning.
-  This means that we can support updating of the table while performing
-  the copy phase of the change. For no lock at all also a double write
-  from new to old must exist and this is not required when this flag is
-  set.
-  This is actually removed even before it was introduced the first time.
-  The new idea is that handlers will handle the lock level already in
-  store_lock for ALTER TABLE partitions.
-
-  HA_PARTITION_ONE_PHASE is a flag that can be set by handlers that take
-  care of changing the partitions online and in one phase. Thus all phases
-  needed to handle the change are implemented inside the storage engine.
-  The storage engine must also support auto-discovery since the frm file
-  is changed as part of the change and this change must be controlled by
-  the storage engine. A typical engine to support this is NDB (through
-  WL #2498).
-*/
-#define HA_PARTITION_FUNCTION_SUPPORTED         (1L << 12)
-#define HA_FAST_CHANGE_PARTITION                (1L << 13)
-#define HA_PARTITION_ONE_PHASE                  (1L << 14)
-
 /*typedef struct {
   ulonglong data_file_length;
   ulonglong max_data_file_length;