Revert scopeInclude clone. Better fixed by #4518

lib/model.js

@@ -2562,9 +2562,6 @@ Model.$injectScope = function (scope, options) {
         }
         }
         return sameModel;
         return sameModel;
       })) {
       })) {
-        // Do not inject Model.$scope.include directly,
-        // make a shallow copy (#4470).
-        scopeInclude = _.clone(scopeInclude);
         options.include.push(scopeInclude);
         options.include.push(scopeInclude);
       }
       }
     });
     });