This is somewhat related to an old-but-good post: -
Using SSH without passwords OR pass phrases
A colleague had generated an SSH key pair using a command such as: -
ssh-keygen
which, by default, asks for, and applies, a passphrase to the generated private key.
This can sometimes get in the way of automated pipelines e.g. Git, Terraform etc. where there're repeated calls to the private key.
*IF* there's absolutely no good reason to use a passphrase - and there are for a lot of folks - the phrase can be removed thusly: -
ssh-keygen -p -P blahblah -N "" -f ~/.ssh/id_rsa
where "blahblah" is the old ( and unwanted passphrase ) and "" ( null ) is the new passphrase.
Easy when you know, how ?