cleanup: remove TYPE_ENUM_PROXY from enum stored_procedure_type

because it is not

sql/sp.cc

@@ -1241,7 +1241,6 @@ Sp_handler::sp_create_routine(THD *thd, const sp_head *sp) const
           ret= sp_drop_routine_internal(thd, sp, table);
           break;
         case TYPE_ENUM_TRIGGER:
-        case TYPE_ENUM_PROXY:
           DBUG_ASSERT(0);
           ret= SP_OK;
         }

sql/sp.h

@@ -54,8 +54,7 @@ enum stored_procedure_type
   TYPE_ENUM_PROCEDURE=2,
   TYPE_ENUM_PACKAGE=3,
   TYPE_ENUM_PACKAGE_BODY=4,
-  TYPE_ENUM_TRIGGER=5,
-  TYPE_ENUM_PROXY=6
+  TYPE_ENUM_TRIGGER=5
 };
 
 
@@ -506,8 +505,6 @@ inline const Sp_handler *Sp_handler::handler(stored_procedure_type type)
     return &sp_handler_package_body;
   case TYPE_ENUM_TRIGGER:
     return &sp_handler_trigger;
-  case TYPE_ENUM_PROXY:
-    break;
   }
   return NULL;
 }

sql/sql_acl.cc

@@ -5883,7 +5883,6 @@ static enum PRIVS_TO_MERGE::what sp_privs_to_merge(stored_procedure_type type)
   case TYPE_ENUM_PACKAGE_BODY:
     return PRIVS_TO_MERGE::PACKAGE_BODY;
   case TYPE_ENUM_TRIGGER:
-  case TYPE_ENUM_PROXY:
     break;
   }
   DBUG_ASSERT(0);