remove latin-1 flag

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index f2add26cfd85c5f0c665e5cc0a2324676eb39def..98162a50674bb927d53d596cdc6403f4011b3efe 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -357,12 +357,7 @@ bool String::IsTwoByteRepresentationUnderneath() {
 
 bool String::HasOnlyAsciiChars() {
   uint32_t type = map()->instance_type();
-#ifndef ENABLE_LATIN_1
-  return (type & kStringEncodingMask) == kOneByteStringTag ||
-         (type & kAsciiDataHintMask) == kAsciiDataHintTag;
-#else
   return (type & kAsciiDataHintMask) == kAsciiDataHintTag;
-#endif
 }