Merge pull request nestjs#3580 from tonyhallett/refactor_remove_stub

test(core): remove unnecessary stub

Author: kamilmysliwiec

packages/core/test/router/router-execution-context.spec.ts

@@ -325,7 +325,6 @@ describe('RouterExecutionContext', () => {
         const value = 'test';
         const response = { render: sinon.spy() };
 
-        sinon.stub(contextCreator, 'reflectResponseHeaders').returns([]);
         sinon.stub(contextCreator, 'reflectRenderTemplate').returns(template);
 
         const handler = contextCreator.createHandleResponseFn(