Remove check_val_every_n_epoch

[tadejsv]

🚀 Feature

I think check_val_every_n_epoch trainer flag should be removed: val_check_interval already contains* all of its functionality.

* The only thing needed would be to interpret val_check_interval=2.0 as check every two epochs. This is just a straightforward extension of the current functionality

[rohitgr7]

Nice!
Somewhat connected to #4406

maybe when we can have 1.1, 1.2, ... all possible int/float values.

[stale]

This issue has been automatically marked as stale because it hasn't had any recent activity. This issue will be closed in 7 days if no further activity occurs. Thank you for your contributions, Pytorch Lightning Team!

[stale]

This issue has been automatically marked as stale because it hasn't had any recent activity. This issue will be closed in 7 days if no further activity occurs. Thank you for your contributions, Pytorch Lightning Team!