MDEV-14585: Adjust the innodb.innodb-alter-tempfile test case

mysql-test/suite/innodb/t/innodb-alter-tempfile.test

@@ -32,24 +32,12 @@ SET debug_dbug='+d,innodb_alter_commit_crash_before_commit';
 --error 2013
 ALTER TABLE t1 ADD PRIMARY KEY (f2, f1);
 
-let TABLENAME_INC= $MYSQLTEST_VARDIR/tmp/tablename.inc;
-perl;
-die unless open OUT, ">$ENV{TABLENAME_INC}";
-chdir "$ENV{'datadir'}/test";
-my @frm_file = map { substr($_, 0, -4) } glob "#sql-*.frm";
-print OUT 'let $temp_table_name=', $frm_file[0], ';';
-close OUT or die;
-EOF
-source $TABLENAME_INC;
-remove_file $TABLENAME_INC;
+remove_files_wildcard $datadir/test #sql-*.frm;
 
 --source include/start_mysqld.inc
 
 show create table t1;
 --echo # Consecutive Alter table does not create same temporary file name
 ALTER TABLE t1 ADD PRIMARY KEY (f2, f1);
---disable_query_log
-eval DROP TABLE `#mysql50#$temp_table_name`;
---enable_query_log
 show create table t1;
 drop table t1;