Bug 1792775 - Part 8: Remove no longer needed ICU draft API guards. r=platform-i18n-reviewers,jfkthame

`UDAT_STANDALONE_NARROW_QUARTERS` has been promoted from draft to stable.

Differential Revision: https://phabricator.services.mozilla.com/D160186

intl/components/src/DisplayNames.cpp

@@ -108,10 +108,8 @@ static bool IsStandaloneMonth(UDateFormatSymbolType symbolType) {
     case UDAT_ZODIAC_NAMES_WIDE:
     case UDAT_ZODIAC_NAMES_ABBREVIATED:
     case UDAT_ZODIAC_NAMES_NARROW:
-#  ifndef U_HIDE_DRAFT_API
     case UDAT_NARROW_QUARTERS:
     case UDAT_STANDALONE_NARROW_QUARTERS:
-#  endif
       return false;
   }
 

intl/components/src/DisplayNames.h

@@ -820,11 +820,7 @@ class DisplayNames final {
         break;
 
       case DisplayNames::Style::Narrow:
-#ifndef U_HIDE_DRAFT_API
         symbolType = UDAT_STANDALONE_NARROW_QUARTERS;
-#else
-        symbolType = UDAT_STANDALONE_SHORT_QUARTERS;
-#endif
         break;
     }