Revert "flakyness test"

This reverts commit 784169cbe5.

src/test/regress/expected/citus_drain_node.out

@@ -115,13 +115,6 @@ SELECT nodename, nodeport, COUNT(*)
  localhost |    57638 |     2
 (2 rows)
 
--- flakyness test
-SELECT floor(random() * 2) + 1;
- ?column?
----------------------------------------------------------------------
-        2
-(1 row)
-
 RESET search_path;
 SET client_min_messages TO WARNING;
 DROP SCHEMA citus_drain_node CASCADE;

src/test/regress/sql/citus_drain_node.sql

@@ -56,9 +56,6 @@ SELECT nodename, nodeport, COUNT(*)
  WHERE placement.groupid = node.groupid
    AND node.noderole = 'primary' GROUP BY nodename, nodeport ORDER BY 1,2;
 
--- flakyness test
-SELECT floor(random() * 2) + 1;
-
 RESET search_path;
 
 SET client_min_messages TO WARNING;