For disease, cane pruning may be netter for you than cordon if you are not spraying - less old wood to hide disease between years. Make sure to shoot prune and shoot position to maintain good ventilation. I pull leaves in the fruiting zone as well.

Thank you for the advice. I practice cane pruning, I will have to remember pulling leaves in the fruiting zone. However, the true question at hand is should I permanently remove the lower of the two cordons on the left side. I guess I feel it is creating more diseased foliage and not really helping production. I am only hesitant because it is a well developed cordon.

Grapes are forgiving. A well developed plant should have upwards of 90% cut each year. I have found the more I cut, the more and better fruit I get on the buds I do leave. Try it. Cut off the cordon but leave a 2 bud spur. If you think you made a mistake after fruiting next year, just start growing another out. Myself, for table grapes with no spray I like growing them up high. Better sun exposure and airflow for drying.