delete the duplicated info. (#239)

Author: kdw503

README.md

@@ -253,11 +253,6 @@ This is required only if your package uses other packages which are registered i
 or your package depends on unregistered private packages.
 
 - In the repository's `Settings`, go to `Secrets and Variables` and expand the caret, click on `Actions`. Add a `New repository secret` called `SSH_PRIVATE_KEY`, and copy the contents of the *private* key for your `github_CI_key` (i.e., not the file ending in `.pub`)
-
-- Set a secret key in the repository settings if you want to use private dependent packages in our lab. 
-  The key should not include a passphrase when the key pair is generated. Add the public key as a 'new SSH key'
-  in the 'SSH and GPG keys' section of your account settings. The corresponding private key should be added as a
-  'New repository secret' in the 'Actions secrets and variables' section of the repository settings.
 - Include the following lines in the jobs section of the `CI.yml` file in the `.github/workflows/` directory
   of your package. (Here, we assume that you set the secret key name as `SSH_PRIVATE_KEY`)