remove release notes section

content/en/docs/reference/scheduling/config.md

@@ -232,24 +232,6 @@ the same configuration parameters (if applicable). This is because the scheduler
 only has one pending pods queue.
 {{< /note >}}
 
-## Upgrading from `v1alpha2` to `v1beta1` {#beta-changes}
-
-When migrating from `kubescheduler.config.k8s.io/v1alpha2` to `kubescheduler.config.k8s.io/v1beta1`,
-beware of the following changes, if applicable:
-
-- `.bindTimeoutSeconds` was moved as part of plugin args for `VolumeBinding`,
-  which can be configured separately per [profile](#profiles).
-- `.extenders` are updated to satisfy API standards. In particular:
-  - `.extenders` decoding is case sensitive. All fields are affected.
-  - `.extenders[*].httpTimeout` is of type `metav1.Duration`.
-  - `.extenders[*].enableHttps` is renamed to `.extenders[*].enableHTTPS`.
-- `RequestedToCapacityRatio` args decoding is case sensitive. All fields are affected.
-- `DefaultPodTopologySpread` [plugin](#scheduling-plugins) is renamed to `SelectorSpread`.
-- `Unreserve` extension point is removed from Profile definition. All `Reserve`
-  plugins implement an `Unreserve` call.
-- `.disablePreemption` was removed. Users can disable preemption by disabling the
-  "DefaultPreemption" PostFilter plugin.
-
 ## {{% heading "whatsnext" %}}
 
 * Read the [kube-scheduler reference](https://kubernetes.io/docs/reference/command-line-tools-reference/kube-scheduler/)