[strong] Remove all remainders of strong mode

src/full-codegen/full-codegen.cc

Index: src/full-codegen/full-codegen.cc
diff --git a/src/full-codegen/full-codegen.cc b/src/full-codegen/full-codegen.cc
index 97f799eac3525835f510da54da0bf4152d692750..db2cd4a151494bb2e67edf673a9775cec43cb6eb 100644
--- a/src/full-codegen/full-codegen.cc
+++ b/src/full-codegen/full-codegen.cc
@@ -1509,8 +1509,7 @@ void FullCodeGenerator::VisitClassLiteral(ClassLiteral* lit) {
 
     EmitClassDefineProperties(lit);
 
-    // Set both the prototype and constructor to have fast properties, and also
-    // freeze them in strong mode.
+    // Set both the prototype and constructor to have fast properties.
     CallRuntimeWithOperands(Runtime::kFinalizeClassDefinition);
 
     if (lit->class_variable_proxy() != nullptr) {