Remove class fields desugaring

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index ba89162129053ba48f5c0cc9349c5433f5ce6335..6e407eef6d765e5dfc2e7012728b6019f1976955 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -673,19 +673,15 @@ class ParserBase {
         : proxy(nullptr),
           extends(parser->impl()->EmptyExpression()),
           properties(parser->impl()->NewClassPropertyList(4)),
-          instance_field_initializers(parser->impl()->NewExpressionList(0)),
           constructor(parser->impl()->EmptyFunctionLiteral()),
           has_seen_constructor(false),
-          static_initializer_var(nullptr),
           has_name_static_property(false),
           has_static_computed_names(false) {}
     VariableProxy* proxy;
     ExpressionT extends;
     typename Types::ClassPropertyList properties;
-    ExpressionListT instance_field_initializers;
     FunctionLiteralT constructor;
     bool has_seen_constructor;
-    Variable* static_initializer_var;
     bool has_name_static_property;
     bool has_static_computed_names;
   };
@@ -2309,7 +2305,6 @@ ParserBase<Impl>::ParseClassFieldForInitializer(bool has_initializer,
       FunctionLiteral::kNoDuplicateParameters,
       FunctionLiteral::kAnonymousExpression, default_eager_compile_hint_,
       initializer_scope->start_position(), true, GetNextFunctionLiteralId());
-  function_literal->set_is_class_field_initializer(true);
   return function_literal;
 }
 
@@ -3162,7 +3157,6 @@ ParserBase<Impl>::ParseLeftHandSideExpression(bool* ok) {
         // Explicit calls to the super constructor using super() perform an
         // implicit binding assignment to the 'this' variable.
         if (is_super_call) {
-          result = impl()->RewriteSuperCall(result);
           ExpressionT this_expr = impl()->ThisExpression(pos);
           result =
               factory()->NewAssignment(Token::INIT, this_expr, result, pos);