[t:2557], remove unneeded code for 5.5.4

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@19816 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -12,10 +12,6 @@ extern "C" {
 #endif
 }
 
-#if !defined(HA_END_SPACE_KEY) || HA_END_SPACE_KEY != 0
-#error
-#endif
-
 static inline void *thd_data_get(THD *thd, int slot) {
     return thd->ha_data[slot].ha_ptr;
 }