When Abseil hardening is enabled, this assertion's condition gets evaluated every time an iterator equality check is performed on iterators from a raw_hash_set.  This occurs very frequently when looping over the contents of sets, due to loop conditions like `it != end()`, and causes about 0.4% CPU overhead to some Google workloads.

PiperOrigin-RevId: 681560141
Change-Id: Ia0177cbef7cf67f9f0b6adf2cf55d9a2ed320d2d