remove information about outdated LB configuration (#39)

Co-authored-by: Florian Thienel <[email protected]>

Author: stackit-ske

docs/load-balancer.md

@@ -3,45 +3,18 @@
 ## Table of Contents
 
 1. [Overview](#overview)
-2. [Class Name Configuration](#class-name-configuration)
-3. [Limitations](#limitations)
-4. [Service Enablement](#service-enablement)
-5. [Configuration](#configuration)
+2. [Limitations](#limitations)
+3. [Service Enablement](#service-enablement)
+4. [Configuration](#configuration)
    - [STACKIT Annotations](#stackit-annotations)
    - [Supported yawol Annotations](#supported-yawol-annotations)
    - [Unsupported yawol Annotations](#unsupported-yawol-annotations)
-6. [Node Labels](#node-labels)
+5. [Node Labels](#node-labels)
 
 ## Overview
 
 The cloud controller manager provisions STACKIT load balancers for Kubernetes services of type load balancer.
 
-In order to avoid collisions with other load balancer implementations, the following annotation needs to be set on the service.
-
-```YAML
-annotations:
-    yawol.stackit.cloud/className: stackit
-```
-
-This annotation is immutable. It must not be changed on existing load balancers.
-The controller will always manage all services whose class name annotation is `stackit`.
-
-> :warning: The CCM adds a finalizer to the service regardless of whether it has a matching class name annotation or not.
-
-## Class Name Configuration
-
-For load balancers with not `stackit` as class name (identified via the `yawol.stackit.cloud/className` annotation) the controller manages them in different ways.
-The controller modes are configured via `nonStackitClassNames` in the cloud-config.yaml:
-
-- `ignore`: Return "implemented elsewhere" for all services whose class name
-  annotation is not `stackit`.
-- `update`: Update load balancers whose class name annotation is not `stackit`.
-  If the load balancer is not found, no error is returned.
-- `updateAndCreate` (default): The CCM treats every service the same, i.e.
-  ignores the class name annotation.
-
-If no `nonStackitClassNames` mode is set in the config file, the mode will automatically be set to `updateAndCreate`.
-
 ## Limitations
 
 - `externalTrafficPolicy=local` is not supported.