Blogs: Remove RSS icon or blog title and icon from sidebar

Example:

Code to remove the RSS icon from your blog post sidebar:

/* --- code to remove rss icon from blog pages --- */
.blog__rss { display:none; }
/* - end - */

To remove both the blog category title and RSS icon, you can apply use this code:

/* --- code to remove sidebar title --- */
.blog__sidebar h2 {display:none;}
/* - end - */

Result when both removed:

Where do I add the code?

Use this link to learn where exactly to add this code snippet:

Where to add your CSS style code