ci: remove assignees

Signed-off-by: jnicoulaud-ledger <102984500+jnicoulaud-ledger@users.noreply.github.com>

Author: jnicoulaud-ledger

.scala-steward.conf

@@ -5,8 +5,6 @@ pullRequests.grouping = [
 updates.limit = 3
 updatePullRequests = "always"
 commits.message = "chore: Update ${artifactName} from ${currentVersion} to ${nextVersion}"
-assignees = [ "rlemaitre" ]
-reviewers = [ "rlemaitre" ]
 
 updates.pin = [
   # Fix to Scala LTS