Rip out most of our outdated modules implementation.

src/ast/ast-expression-rewriter.cc

Index: src/ast/ast-expression-rewriter.cc
diff --git a/src/ast/ast-expression-rewriter.cc b/src/ast/ast-expression-rewriter.cc
index b39f7f1f0cb32617408fcef5ac09e5cadecadb35..53aabe91c38d5ded95a894dd78b5d8b28385284b 100644
--- a/src/ast/ast-expression-rewriter.cc
+++ b/src/ast/ast-expression-rewriter.cc
@@ -70,12 +70,6 @@ void AstExpressionRewriter::VisitImportDeclaration(ImportDeclaration* node) {
 }
 
 
-void AstExpressionRewriter::VisitExportDeclaration(ExportDeclaration* node) {
-  // Not visiting `proxy_`.
-  NOTHING();
-}
-
-
 void AstExpressionRewriter::VisitBlock(Block* node) {
   VisitStatements(node->statements());
 }