src: remove unused string postmortem constants

Author: kvakil

src/llv8-constants.cc

@@ -303,22 +303,18 @@ void TwoByteString::Load() {
 
 
 void ConsString::Load() {
-  kFirstOffset = LoadConstant({"class_ConsString__first__String",
-                               "class_ConsString__first_offset__int"});
-  kSecondOffset = LoadConstant({"class_ConsString__second__String",
-                                "class_ConsString__second_offset__int"});
+  kFirstOffset = LoadConstant({"class_ConsString__first__String"});
+  kSecondOffset = LoadConstant({"class_ConsString__second__String"});
 }
 
 
 void SlicedString::Load() {
   kParentOffset = LoadConstant("class_SlicedString__parent__String");
-  kOffsetOffset = LoadConstant({"class_SlicedString__offset__SMI",
-                                "class_SlicedString__offset_offset__int"});
+  kOffsetOffset = LoadConstant({"class_SlicedString__offset__SMI"});
 }
 
 void ThinString::Load() {
-  kActualOffset = LoadConstant({"class_ThinString__actual__String",
-                                "class_ThinString__actual_offset__int"});
+  kActualOffset = LoadConstant({"class_ThinString__actual__String"});
 }
 
 void FixedArrayBase::Load() {