Removed the test case for MDEV-15151 for the following reasons:

1. The changed variant did not fail without the patch for MDEV-16629
while the original test case did fail.
2. In any case the test case should go to cte_recursive_not_embedded.test
that was not created yet.

mysql-test/r/cte_recursive.result

@@ -3300,24 +3300,3 @@ SELECT func();
 func()
 1
 DROP FUNCTION func;
-#
-# MDEV-15151: function with recursive CTE using no base tables
-#             (duplicate of  MDEV-16661)
-#
-connection default;
-CREATE TABLE t1 (id int  KEY);
-INSERT INTO t1 VALUES (0), (1),(2);
-CREATE OR REPLACE FUNCTION func() RETURNS int
-RETURN
-(
-WITH recursive cte AS
-(SELECT 1 a UNION SELECT cte.* FROM cte natural join t1)
-SELECT * FROM cte  limit 1
-);
-connect  con1,localhost,root,,;
-SELECT func();
-connection default;
-KILL QUERY 5;
-DROP FUNCTION func;
-DROP TABLE t1;
-disconnect con1;

mysql-test/t/cte_recursive.test

---source include/not_embedded.inc
 create table t1 (a int, b varchar(32));
 insert into t1 values
 (4,'aaaa' ), (7,'bb'), (1,'ccc'), (4,'dd');
@@ -2324,33 +2323,3 @@ RETURN
 SELECT func();
 
 DROP FUNCTION func;
-
---echo #
---echo # MDEV-15151: function with recursive CTE using no base tables
---echo #             (duplicate of  MDEV-16661)
---echo #
-
---connection default
-
-CREATE TABLE t1 (id int  KEY);
-INSERT INTO t1 VALUES (0), (1),(2);
-
-CREATE OR REPLACE FUNCTION func() RETURNS int
-RETURN
-(
-  WITH recursive cte AS
-  (SELECT 1 a UNION SELECT cte.* FROM cte natural join t1)
-  SELECT * FROM cte  limit 1
-);
-
---connect (con1,localhost,root,,)
---let $conid= `SELECT CONNECTION_ID()`
---send SELECT func()
-
---connection default
---eval KILL QUERY $conid
---source include/restart_mysqld.inc
-
-DROP FUNCTION func;
-DROP TABLE t1;
---disconnect con1