Bug 1999316 - Part 6: Remove era aliases for ROC calendar. r=spidermonkey-reviewers,mgaudet

Remove aliases per <tc39/proposal-intl-era-monthcode#72>.

Differential Revision: https://phabricator.services.mozilla.com/D272036

Author: anba

js/src/builtin/temporal/Calendar.cpp

@@ -762,7 +762,7 @@ static mozilla::Maybe<EraCode> CanonicalizeEraInCalendar(
   MOZ_ASSERT(CalendarSupportsEra(calendar));
 
   // Note: Assigning MaxLength to EraNameMaxLength() breaks the CDT indexer.
-  constexpr size_t MaxLength = 24;
+  constexpr size_t MaxLength = 8;
   static_assert(MaxLength >= EraNameMaxLength(),
                 "Storage size is at least as large as the largest known era");
 

js/src/builtin/temporal/Era.h

@@ -135,13 +135,10 @@ inline constexpr auto Persian = {
 
 inline constexpr auto ROC = {
     "roc"sv,
-    "minguo"sv,
 };
 
 inline constexpr auto ROCInverse = {
     "broc"sv,
-    "before-roc"sv,
-    "minguo-qian"sv,
 };
 }  // namespace names
 }  // namespace eras