Remove ternary equals functions. These were incorrectly defined (eg, Equals(knownZero, knownZero) produces knownZero) and unused.
Remove ternary equals functions.
These were incorrectly defined (eg, Equals(knownZero, knownZero) produces knownZero) and unused.

PiperOrigin-RevId: 398337779

google/xls,google/xls,google/xls,google/xls,google/xls,google/xls