Merge branch 'remove_gitlab_folder' into 'master'

remove gitlab subfolder for the SSH key

See merge request detectors/pycalibration!501

README.rst

@@ -280,7 +280,7 @@ To set up the keys:
       User git
       Port 10022
       ForwardX11 no
-      IdentityFile ~/.ssh/gitlab/id_ed25519
+      IdentityFile ~/.ssh/id_ed25519
 
 Once this is done you can clone repositories you have access to from GitLab
 without having to enter your password each time. As ``pycalibration``