Clean up installing-atom.md

Clean up the code, remove an unnecessary comment.

content/getting-started/sections/installing-atom.md

@@ -78,8 +78,6 @@ To install Atom on Debian, Ubuntu, or related distributions, add our official
 package repository to your system by running the following commands:
 
 ``` command-line
-# apt-key has been deprecated. These two commands are used in its place.
-$ sudo touch /usr/share/keyrings/atom-archive-keyring.gpg
 $ wget -qO - https://packagecloud.io/AtomEditor/atom/gpgkey | gpg --dearmor | sudo tee /usr/share/keyrings/atom-archive-keyring.gpg
 $ sudo sh -c 'echo "deb [arch=amd64] https://packagecloud.io/AtomEditor/atom/any/ any main" > /etc/apt/sources.list.d/atom.list'
 $ sudo apt-get update