@punamdahiya You are right, we don't need this. However, I copied this 1:1 from the video app. It looks like it is not needed there as well. Do you want me to remove it there too? 
A few line further down the background is set to a gradient, so the property is set twice anyway...
```
background: linear-gradient(to bottom, #222 0%,#000 100%);
```