Remove temp hack which remove true

The fix is already in ICU-20310

Bug: v8:8565
Change-Id: Ifcef1c643ec5ea0cc95f29ee5a3a1962cb5e6b17
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2591883Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71764}

src/objects/intl-objects.cc

@@ -588,27 +588,6 @@ Maybe<std::string> Intl::ToLanguageTag(const icu::Locale& locale) {
     return Nothing<std::string>();
   }
   DCHECK(U_SUCCESS(status));
-
-  // Hack to remove -true and -yes from unicode extensions
-  // Address https://crbug.com/v8/8565
-  // TODO(ftang): Move the following "remove true" logic into ICU toLanguageTag
-  // by fixing ICU-20310.
-  size_t u_ext_start = res.find("-u-");
-  if (u_ext_start != std::string::npos) {
-    // remove "-true" and "-yes" after -u-
-    const std::vector<std::string> remove_items({"-true", "-yes"});
-    for (auto item = remove_items.begin(); item != remove_items.end(); item++) {
-      for (size_t sep_remove =
-               res.find(*item, u_ext_start + 5 /* strlen("-u-xx") == 5 */);
-           sep_remove != std::string::npos; sep_remove = res.find(*item)) {
-        size_t end_of_sep_remove = sep_remove + item->length();
-        if (res.length() == end_of_sep_remove ||
-            res.at(end_of_sep_remove) == '-') {
-          res.erase(sep_remove, item->length());
-        }
-      }
-    }
-  }
   return Just(res);
 }