MDEV-9945 - main.kill_processlist-6619 fails sporadically

SHOW PROCESSLIST output can be affected by not completed concurrent queries.
Removed this affected SHOW PROCESSLIST since it doesn't seem to affect original
problem.

mysql-test/r/kill_processlist-6619.result

 connect  con1,localhost,root,,;
-SHOW PROCESSLIST;
-Id	User	Host	db	Command	Time	State	Info	Progress
-#	root	#	test	Sleep	#	#	NULL	0.000
-#	root	#	test	Query	#	#	SHOW PROCESSLIST	0.000
 connection default;
 KILL QUERY con_id;
 connection con1;

mysql-test/t/kill_processlist-6619.test

@@ -5,8 +5,6 @@
 --enable_connect_log
 --connect (con1,localhost,root,,)
 --let $con_id = `SELECT CONNECTION_ID()`
---replace_column 1 # 3 # 6 # 7 #
-SHOW PROCESSLIST;
 --connection default
 --replace_result $con_id con_id
 eval KILL QUERY $con_id;