Revert "Add index value checking to MaxUnpool2d and MaxUnpool3d (#70545)"
This reverts commit 53ef66bb59a81e9b294e69596889e4d310d2fb9b.
Reverted https://github.com/pytorch/pytorch/pull/70545 on behalf of https://github.com/malfet due to as it broke cuda-10.2 test on trunk, see https://hud.pytorch.org/pytorch/pytorch/commit/53ef66bb59a81e9b294e69596889e4d310d2fb9b
