Remove extra files

tests/queries/0_stateless/00000_test.reference

@@ -1,37 +0,0 @@
-a
-a
-a
-b
-xx
-xx
-\N
-\N
-\N
-\N
-\N
-\N
-\N
-\N
-\N
-\N
-\N
-\N
----
-	4
-	xx
-	xx
-a	2020-01-01 00:00:00.000
-a	2020-01-01 10:10:10.000
-a	2020-01-01 10:10:10.110
-a	1
-a	1
-a	1
-a	a
-a	a
-a	b
-a	\N
-a	\N
-a	\N
-a	\N
-a	\N
-z	a

tests/queries/0_stateless/00000_test.sql

@@ -1,12 +0,0 @@
-set max_threads = 1, read_in_order_two_level_merge_threshold = 1;
-
-CREATE OR REPLACE TABLE test(
-    key String,
-    val Map(String, String)
-) engine = MergeTree
-order by key settings min_bytes_for_wide_part = 0;
-insert into test VALUES ('', {'x':'xx'});
-insert into test VALUES ('', {});
-SELECT key, arrayJoin(mapValues(val)) as v FROM test ORDER BY key, v;
-DROP TABLE test;
-