cleanup: remove unused handler table flag

sql/handler.h

@@ -195,7 +195,7 @@ enum enum_alter_inplace_result {
 #define HA_HAS_NEW_CHECKSUM    (1ULL << 38)
 #define HA_CAN_VIRTUAL_COLUMNS (1ULL << 39)
 #define HA_MRR_CANT_SORT       (1ULL << 40)
-#define HA_RECORD_MUST_BE_CLEAN_ON_WRITE (1ULL << 41)
+#define HA_RECORD_MUST_BE_CLEAN_ON_WRITE (1ULL << 41) /* unused */
 
 /*
   This storage engine supports condition pushdown

sql/sql_insert.cc

@@ -955,12 +955,7 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
             be overwritten by fill_record() anyway (and fill_record() does not
             use default values in this case).
           */
-#ifdef HAVE_valgrind
-          if (table->file->ha_table_flags() && HA_RECORD_MUST_BE_CLEAN_ON_WRITE)
-            restore_record(table,s->default_values);	// Get empty record
-          else
-#endif
-            table->record[0][0]= share->default_values[0];
+          table->record[0][0]= share->default_values[0];
 
           /* Fix undefined null_bits. */
           if (share->null_bytes > 1 && share->last_null_bit_pos)