Refs #19102 -- Removed flaky test Ticket19102Tests.test_ticket_19102_distinct_on.
Refs #19102 -- Removed flaky test Ticket19102Tests.test_ticket_19102_distinct_on.

The subquery pushdown only happens because another table is involved in
filter. It's not the distinct usage that causes the pushdown.

The distinct('description').order_by('pk') expression is not valid
because SELECT DISTINCT ON must match initial ORDER BY expressions
which is not the case here.

takis/django,freakboy3742/django,dsanders11/django,rsalmaso/django,atul-bhouraskar/django,blighj/django,atul-bhouraskar/django,ghickman/django,monetate/django,monetate/django,pauloxnet/django,pauloxnet/django,solarissmoke/django,dsanders11/django,solarissmoke/django,atul-bhouraskar/django,elena/django,monetate/django,monetate/django,takis/django,takis/django,apollo13/django,shaib/django,blighj/django,shaib/django,adamchainz/django,solarissmoke/django,pauloxnet/django,MarkusH/django,django/django,dsanders11/django,ghickman/django,felixxm/django,django/django,blighj/django,rsalmaso/django,auvipy/django,elena/django,felixxm/django,solarissmoke/django,ghickman/django,manhhomienbienthuy/django,elena/django,adamchainz/django,MarkusH/django,MarkusH/django,django/django,auvipy/django,apollo13/django,MarkusH/django,elena/django,apollo13/django,manhhomienbienthuy/django,ghickman/django,manhhomienbienthuy/django,freakboy3742/django,auvipy/django,shaib/django,apollo13/django,rsalmaso/django,rsalmaso/django,adamchainz/django,dsanders11/django,felixxm/django,blighj/django,manhhomienbienthuy/django,freakboy3742/django,adamchainz/django,felixxm/django,takis/django,pauloxnet/django,django/django,atul-bhouraskar/django,shaib/django,auvipy/django