removed couple of debugging leftovers

t/pt-table-checksum/basics.t

@@ -72,7 +72,6 @@ ok(
       sub { pt_table_checksum::main(@args) },
       "$sample/default-results-$sandbox_version.txt",
       post_pipe => 'awk \'{print $2 " " $3 " " $4 " " $6 " " $8}\'',
-      keep_output => 1,
    ),
    "Default checksum"
 );

t/pt-table-checksum/progress.t

@@ -73,7 +73,6 @@ system("$trunk/util/wait-to-exec '$scripts/wait-for-chunk.sh 12345 sakila city 1
 $output = output(
    sub { pt_table_checksum::main(@args, qw(-d sakila)); },
    stderr => 1,
-   keep_output => 1,
 );
 
 like(