PT-2154 - Fix tests for pt-table-sync

- Removed debug output from t/pt-table-sync/issue_920.t
- Removed debug output from t/pt-table-sync/issue_996.t

t/pt-table-sync/issue_920.t

@@ -63,8 +63,6 @@ is_deeply(
    [[1,100],[2,200]],
    'Flipped 2nd table'
 );
-diag(`/tmp/12345/use -e "select * from issue_920.PK_UK_test order by id"`);
-diag(`/tmp/12345/use -e "select * from issue_920.PK_UK_test_2 order by id"`);
 
 # #############################################################################
 # Done.

t/pt-table-sync/issue_996.t

@@ -82,7 +82,6 @@ my $file = "/tmp/mts-output.txt";
 output(
    sub { pt_table_sync::main(@args, qw(--chunk-size 5 -v -v)) },
    file => $file,
-   stderr => 1,
 );
 
 # The output shows that the 20-row range was chunked into 4 5-row sub-chunks.