removed DEV_KEY value to cleanup code

value moved to a pipeline variable

.gitlab-ci.yml

@@ -23,7 +23,7 @@ variables:
   PKR_VAR_networks: '["8cf2f12e-905d-46d9-bc70-b0897c65f75a"]'
   GIT_AUTHOR_NAME: "Gitlab runner"
   GIT_AUTHOR_EMAIL: "gitlab@runner"
-  DEV_KEY: "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBBXBfBmQDq1HK8U0zK6gDF0jyfWChuFYEPiRp1Wgl0XFJU7JoUngqkE/GAic8kCzKW0hPMiweSjmWdKlAapv/dk= krishmoodbidri@krishs-MacBook-Pro-3.local" 
+  DEV_KEY: ""
   INSTANCE_FLAVOR: "m1.medium-ruffner"
   HTTP_PROXY_INSTANCE_NAME: "http-proxy"
   SSH_PROXY_INSTANCE_NAME: "ssh-proxy"