📝 Remove step that is only is supported on Mac

docs/build-instructions/linux.md

@@ -50,11 +50,8 @@ script/grunt mkdeb
 
 Use the newly installed atom by restarting any running atom instances.
 
-To run `atom` and `apm` from a terminal open atom's command palette `ctrl+shift+p` and run `Window: Install Shell Commands`
-
 ## Troubleshooting
 
-
 ### Exception: "TypeError: Unable to watch path"
 
 If you get following error with a big traceback right after Atom starts: