fix(@ngtools/webpack): fix duplicate LAZY_ROUTE_MAP exports (#7107)

Author: FrozenPandaz

packages/@ngtools/webpack/src/loader.ts

@@ -443,9 +443,7 @@ export function _getModuleExports(plugin: AotPlugin,
   return exports
     .filter(node => {
 
-      const identifiers = refactor.findAstNodes(node, ts.SyntaxKind.Identifier, false);
-
-      identifiers
+      const identifiers = refactor.findAstNodes(node, ts.SyntaxKind.Identifier, false)
         .filter(node => node.getText() === plugin.entryModule.className);
 
       return identifiers.length > 0;