Revert "Add support for timezone offset and timezone name."

runtime/lib/date.cc

Index: runtime/lib/date.cc
diff --git a/runtime/lib/date.cc b/runtime/lib/date.cc
index 0c49e5b3fa0557e2e4d7d7e8d8d3891770cd54bb..90158c9a345475fcf072595be66597ccd2079842 100644
--- a/runtime/lib/date.cc
+++ b/runtime/lib/date.cc
@@ -139,32 +139,6 @@ DEFINE_NATIVE_ENTRY(DateNatives_brokenDownToSecondsSinceEpoch, 7) {
 }
 
 
-DEFINE_NATIVE_ENTRY(DateNatives_timeZoneName, 1) {
-  GET_NATIVE_ARGUMENT(Integer, dart_seconds, arguments->At(0));
-  int64_t seconds = dart_seconds.AsInt64Value();
-  const char* name;
-  bool succeeded = OS::GetTimeZoneName(seconds, &name);
-  if (!succeeded) {
-    UNIMPLEMENTED();
-  }
-  const String& dart_name = String::Handle(String::New(name));
-  arguments->SetReturn(dart_name);
-}
-
-
-DEFINE_NATIVE_ENTRY(DateNatives_timeZoneOffsetInSeconds, 1) {
-  GET_NATIVE_ARGUMENT(Integer, dart_seconds, arguments->At(0));
-  int64_t seconds = dart_seconds.AsInt64Value();
-  int offset;
-  bool succeeded = OS::GetTimeZoneOffsetInSeconds(seconds, &offset);
-  if (!succeeded) {
-    UNIMPLEMENTED();
-  }
-  const Integer& dart_offset = Integer::Handle(Integer::New(offset));
-  arguments->SetReturn(dart_offset);
-}
-
-
 DEFINE_NATIVE_ENTRY(DateNatives_currentTimeMillis, 0) {
   const Integer& time = Integer::Handle(
       Integer::New(OS::GetCurrentTimeMillis()));