To delete a bookmark, you can simply head back to that website, click the star icon again and click ‘Remove’.  You can also get rid of bookmarks by clicking on the three dots in the top right corner of Chrome, hovering over ‘Bookmarks’ and choosing ‘Bookmark Manager’. Then just find the bookmark you want to remove, click the three dots next to it and hit ‘Delete’. This method makes it easier to delete a few bookmarks in one sitting.