Remove Box Shadow on specific image

Site URL: https://shuifeng.squarespace.com

Hi all. I have some code that makes drop shadows on all images throughout my site but I want to remove it from one specific image. I've tried the code below but it's not working - what am I doing incorrectly? Site: https://shuifeng.squarespace.com PW: ShuiFeng

Page: https://shuifeng.squarespace.com/about - it's the photo near the bottom that I want to remove the shadow from. 

Thanks.

#block-4e99c0967d668fded5ad .image-block {
    box-shadow: unset;
  }

Thanks much Tuan, it worked like a charm.