UndeclarePossiblePol

UndeclarePossiblePol[x]
removes x from list of symbolic representations of possible vector boson polarizations.
UndeclarePossiblePol[x, y, ...]
removes x, y, ... from list of symbolic representations of possible vector boson polarizations.
Remove one symbol from list of possible vector boson polarizations:
Remove many symbols from list of possible vector boson polarizations: