Remove workaround for authorization glitch

reviews/srv/reviews-service.cds

@@ -27,14 +27,7 @@ service ReviewsService {
 annotate ReviewsService.Reviews with @restrict:[
   { grant:'READ',   to:'any' },                 // everybody can read reviews
   { grant:'CREATE', to:'authenticated-user' },  // users must login to add reviews
-  /////////////////////////////////////////////////
+  { grant:'UPDATE', to:'authenticated-user', where:'reviewer=$user' },
-  //
-  // Temporarily disabling this due to glitch in CAP Node.js runtime:
-  // { grant:'UPDATE', to:'authenticated-user', where:'reviewer=$user' },
-  // -> reenable it when the issue is fixed
-     { grant:'UPDATE', to:'authenticated-user' },
-  //
-  ////////////////////////////////////////////////////
   { grant:'DELETE', to:'admin' },
 ];