remove --default-myisam from mtr

it was never doing anything anyway

man/mysql-test-run.pl.1

@@ -803,22 +803,6 @@ does not fail if Debug Sync is not compiled in\&.
 .sp -1
 .IP \(bu 2.3
 .\}
-.\" mysql-test-run.pl: default-myisam option
-.\" default-myisam option: mysql-test-run.pl
-\fB\-\-default\-myisam\fR
-.sp
-Set default storage engine to MyISAM for non-innodb tests\&. This is 
-needed after switching default storage engine to InnoDB\&.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
 .\" mysql-test-run.pl: defaults-file option
 .\" defaults-file option: mysql-test-run.pl
 \fB\-\-defaults\-file=\fR\fB\fIfile_name\fR\fR

mysql-test/mysql-test-run.pl

@@ -1083,7 +1083,6 @@ sub print_global_resfile {
   resfile_global("shutdown-timeout", $opt_shutdown_timeout ? 1 : 0);
   resfile_global("warnings", $opt_warnings ? 1 : 0);
   resfile_global("max-connections", $opt_max_connections);
-#  resfile_global("default-myisam", $opt_default_myisam ? 1 : 0);
   resfile_global("product", "MySQL");
   # Somewhat hacky code to convert numeric version back to dot notation
   my $v1= int($mysql_version_id / 10000);
@@ -1244,7 +1243,6 @@ sub command_line_setup {
              'stop-file=s'              => \$opt_stop_file,
              'stop-keep-alive=i'        => \$opt_stop_keep_alive,
 	     'max-connections=i'        => \$opt_max_connections,
-	     'default-myisam!'          => \&collect_option,
 	     'report-times'             => \$opt_report_times,
 	     'result-file'              => \$opt_resfile,
 	     'stress=s'                 => \$opt_stress,
@@ -6638,9 +6636,6 @@ ($)
   timediff              With --timestamp, also print time passed since
                         *previous* test started
   max-connections=N     Max number of open connection to server in mysqltest
-  default-myisam        Set default storage engine to MyISAM for non-innodb
-                        tests. This is needed after switching default storage
-                        engine to InnoDB.
   report-times          Report how much time has been spent on different
                         phases of test execution.
   stress=ARGS           Run stress test, providing options to