ci: do not chmod $SSH_PRIVATE_KEY env var

- gitlab ci var is now type env var instead of file

.gitlab-ci.yml

@@ -23,7 +23,6 @@ deploy:
   before_script:
     - "command -v ssh-agent >/dev/null || ( apk add --no-cache openssh-client )"
     - eval $(ssh-agent -s)
-    - chmod 400 "$SSH_PRIVATE_KEY"
     - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
     - mkdir -p ~/.ssh
     - chmod 700 ~/.ssh