Remove unused Module-related AST nodes and associated codegen

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 937f5b086b41029a1e4c70130ae3953cca3d1fe8..aa4987fcd291f1d37022e22535cf608b52e37cf4 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -11603,12 +11603,6 @@ void HOptimizedGraphBuilder::VisitFunctionDeclaration(
 }
 
 
-void HOptimizedGraphBuilder::VisitModuleDeclaration(
-    ModuleDeclaration* declaration) {
-  return Bailout(kModuleDeclaration);
-}
-
-
 void HOptimizedGraphBuilder::VisitImportDeclaration(
     ImportDeclaration* declaration) {
   UNREACHABLE();
@@ -11621,26 +11615,6 @@ void HOptimizedGraphBuilder::VisitExportDeclaration(
 }
 
 
-void HOptimizedGraphBuilder::VisitModuleLiteral(ModuleLiteral* module) {
-  UNREACHABLE();
-}
-
-
-void HOptimizedGraphBuilder::VisitModulePath(ModulePath* module) {
-  UNREACHABLE();
-}
-
-
-void HOptimizedGraphBuilder::VisitModuleUrl(ModuleUrl* module) {
-  UNREACHABLE();
-}
-
-
-void HOptimizedGraphBuilder::VisitModuleStatement(ModuleStatement* stmt) {
-  UNREACHABLE();
-}
-
-
 // Generators for inline runtime functions.
 // Support for types.
 void HOptimizedGraphBuilder::GenerateIsSmi(CallRuntime* call) {