Remove unused Zone argument from InitializeAstVisitor

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 6cd448c5404a284c871b263c981e395e58511a1b..19a646e123e997ee4cc7bd9137023069fa658262 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -133,13 +133,14 @@ void BytecodeGenerator::ControlScope::PerformCommand(Command command,
 
 BytecodeGenerator::BytecodeGenerator(Isolate* isolate, Zone* zone)
     : isolate_(isolate),
+      zone_(zone),
       builder_(isolate, zone),
       info_(nullptr),
       scope_(nullptr),
       globals_(0, zone),
       control_scope_(nullptr),
       current_context_(Register::function_context()) {
-  InitializeAstVisitor(isolate, zone);
+  InitializeAstVisitor(isolate);
 }