test(NODE-4834): Remove out of place assertion

Author: W-A-James

test/unit/cmap/connection.test.ts

@@ -647,7 +647,6 @@ describe('new Connection()', function() {
         connection.destroy({ force: true });
         clock.tick(1);
         expect(driverSocket.destroy).to.have.been.calledThrice;
-        expect(driverSocket.end).to.not.have.been.called;
       });
     });