Fix rpl_log and rpl_rotate_logs test result

 - Remove the expected warrnings when "show binary logs" are called on zero size binary log files. 


mysql-test/r/rpl_log.result:
  Remove the warnings that is no longer displayed when "show binary logs" is called on zero size log files. 
  Checked against 4.0, no warnings there.
mysql-test/r/rpl_rotate_logs.result:
  Remove the warnings that is no longer displayed when "show binary logs" is called on zero size log files. 
  Checked against 4.0, no warnings there.

mysql-test/r/rpl_log.result

@@ -71,15 +71,11 @@ show binary logs;
 Log_name	File_size
 master-bin.000001	0
 master-bin.000002	510
-Warnings:
-Error	29	File 'master-bin.000001' not found (Errcode: 2)
 start slave;
 show binary logs;
 Log_name	File_size
 slave-bin.000001	0
 slave-bin.000002	348
-Warnings:
-Error	29	File 'slave-bin.000001' not found (Errcode: 2)
 show binlog events in 'slave-bin.000001' from 4;
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 slave-bin.000001	4	Format_desc	2	98	Server ver: VERSION, Binlog ver: 4

mysql-test/r/rpl_rotate_logs.result

@@ -30,9 +30,6 @@ Log_name	File_size
 master-bin.000001	0
 master-bin.000002	0
 master-bin.000003	98
-Warnings:
-Error	29	File 'master-bin.000001' not found (Errcode: 2)
-Error	29	File 'master-bin.000002' not found (Errcode: 2)
 create table t3 select * from temp_table;
 select * from t3;
 a
@@ -48,15 +45,11 @@ show master logs;
 Log_name	File_size
 master-bin.000002	0
 master-bin.000003	407
-Warnings:
-Error	29	File 'master-bin.000002' not found (Errcode: 2)
 purge binary logs to 'master-bin.000002';
 show binary logs;
 Log_name	File_size
 master-bin.000002	0
 master-bin.000003	407
-Warnings:
-Error	29	File 'master-bin.000002' not found (Errcode: 2)
 purge master logs before now();
 show binary logs;
 Log_name	File_size
@@ -84,9 +77,6 @@ Log_name	File_size
 master-bin.000003	0
 master-bin.000004	0
 master-bin.000005	2032
-Warnings:
-Error	29	File 'master-bin.000003' not found (Errcode: 2)
-Error	29	File 'master-bin.000004' not found (Errcode: 2)
 show master status;
 File	Position	Binlog_Do_DB	Binlog_Ignore_DB
 master-bin.000005	2032