[modules] AST and parser rework.

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 01da4bf331a3338c85d94e564cf346edfa7a1ecc..623e83fa67a463c621af9db933822f41eb12aa57 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -1232,11 +1232,6 @@ void AstGraphBuilder::VisitFunctionDeclaration(FunctionDeclaration* decl) {
 }
 
 
-void AstGraphBuilder::VisitImportDeclaration(ImportDeclaration* decl) {
-  UNREACHABLE();
-}
-
-
 void AstGraphBuilder::VisitBlock(Block* stmt) {
   BlockBuilder block(this);
   ControlScopeForBreakable scope(this, stmt, &block);