Remove map_legacy_users from example configuration (#2590)

Author: nblock

config-example.yaml

@@ -375,19 +375,6 @@ unix_socket_permission: "0770"
 #     # - plain: Use plain code verifier
 #     # - S256: Use SHA256 hashed code verifier (default, recommended)
 #     method: S256
-#
-#   # Map legacy users from pre-0.24.0 versions of headscale to the new OIDC users
-#   # by taking the username from the legacy user and matching it with the username
-#   # provided by the OIDC. This is useful when migrating from legacy users to OIDC
-#   # to force them using the unique identifier from the OIDC and to give them a
-#   # proper display name and picture if available.
-#   # Note that this will only work if the username from the legacy user is the same
-#   # and there is a possibility for account takeover should a username have changed
-#   # with the provider.
-#   # When this feature is disabled, it will cause all new logins to be created as new users.
-#   # Note this option will be removed in the future and should be set to false
-#   # on all new installations, or when all users have logged in with OIDC once.
-#   map_legacy_users: false
 
 # Logtail configuration
 # Logtail is Tailscales logging and auditing infrastructure, it allows the control panel