Remove unused Module-related AST nodes and associated codegen

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 6809cfed01cee4a23734fe64c26e113683d81d12..e62e34ef07809b8ee0062614472d09699ac820ce 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -998,11 +998,6 @@ void AstGraphBuilder::VisitFunctionDeclaration(FunctionDeclaration* decl) {
 }
 
 
-void AstGraphBuilder::VisitModuleDeclaration(ModuleDeclaration* decl) {
-  UNREACHABLE();
-}
-
-
 void AstGraphBuilder::VisitImportDeclaration(ImportDeclaration* decl) {
   UNREACHABLE();
 }
@@ -1013,15 +1008,6 @@ void AstGraphBuilder::VisitExportDeclaration(ExportDeclaration* decl) {
 }
 
 
-void AstGraphBuilder::VisitModuleLiteral(ModuleLiteral* modl) { UNREACHABLE(); }
-
-
-void AstGraphBuilder::VisitModulePath(ModulePath* modl) { UNREACHABLE(); }
-
-
-void AstGraphBuilder::VisitModuleUrl(ModuleUrl* modl) { UNREACHABLE(); }
-
-
 void AstGraphBuilder::VisitBlock(Block* stmt) {
   BlockBuilder block(this);
   ControlScopeForBreakable scope(this, stmt, &block);
@@ -1045,11 +1031,6 @@ void AstGraphBuilder::VisitBlock(Block* stmt) {
 }
 
 
-void AstGraphBuilder::VisitModuleStatement(ModuleStatement* stmt) {
-  UNREACHABLE();
-}
-
-
 void AstGraphBuilder::VisitExpressionStatement(ExpressionStatement* stmt) {
   VisitForEffect(stmt->expression());
 }