Remove outdated comment on logging in to the current account

Co-authored-by: Paula <[email protected]>

hooks/environment

@@ -174,7 +174,6 @@ function assume_role_for_ecr_login() {
   export ${export_credentials?}
 }
 
-# For logging into the current AWS account’s registry
 if [[ "${BUILDKITE_PLUGIN_ECR_LOGIN:-}" =~ ^(true|1)$ ]] ; then
   (
     if [[ -n "${BUILDKITE_PLUGIN_ECR_ASSUME_ROLE_ROLE_ARN:-}" ]]; then