[ssh] Remove default ssh key from code.unbl.ink

ssh/.ssh/config

@@ -24,7 +24,6 @@ Host github.com
 # Home Gitea account:
 Host code.unbl.ink git.service 192.168.40.83 gogs*
   User git
-  IdentityFile ~/.ssh/2024_git
   PreferredAuthentications publickey
   PasswordAuthentication no
   Port 222