Remove remaining do_delete from unit tests

Remove remaining do_delete from unit tests

Since we clean all table contents after every unit test,
there's no need to automatically delete resources, which lengthens
test runs unnecessarily.

Additionally, some tests were calling with port(do_delete=X), while the
port context manager doesn't actually declare that argument.

Change-Id: I2e323082dd036502f9a1dacbe4278a8ece6b8f7a