removeCustomErrorTranslation method
Removes a custom translation for a specific error key and locale.
If the translation doesn't exist, this method does nothing.
Usage:
localizations.removeCustomErrorTranslation('fr', PredefinedFormErrorKey(PredefinedFormErrorType.required));
Implementation
void removeCustomErrorTranslation(String locale, FormErrorKey key) {
_customTranslations[locale]?.remove(key);
}