Update "drift detection" configuration docs

Signed-off-by: Hidde Beydals <hidde@hhh.computer>

content/en/flux/installation/configuration/helm-drift-detection.md

@@ -5,39 +5,7 @@ description: "How to enable Helm drift detection in Flux"
 weight: 20
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-At present, Helm releases are not by default checked for drift compared to
-cluster-state. To enable experimental drift detection, you must add the
-`--feature-gates=DetectDrift=true` flag to the helm-controller Deployment.
-
-Enabling it will cause the controller to check for drift on all Helm releases
-using a dry-run Server Side Apply, triggering an upgrade if a change is detected.
-For detailed information about this feature, [refer to the
-documentation](/flux/components/helm/helmreleases/#drift-detection).
-
-To enable drift detection [during bootstrap](boostrap-customization.md) add the following patches to the flux-system `kustomization.yaml`:
-
-```yaml
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-resources:
-  - gotk-components.yaml
-  - gotk-sync.yaml
-patches:
-  - patch: |
-      # Enable drift detection and correction
-      - op: add
-        path: /spec/template/spec/containers/0/args/-
-        value: --feature-gates=DetectDrift=true,CorrectDrift=true
-      # Enable debug logging for diff output (optional)
-      - op: replace
-        path: /spec/template/spec/containers/0/args/2
-        value: --log-level=debug
-    target:
-      kind: Deployment
-      name: helm-controller
-```
-
-{{% alert color="info" title="Disable drift correction" %}}
-To help aid transition to this new feature, it is possible to enable drift detection without it correcting drift.
-This can be done by setting the `CorrectDrift=false` feature flag in the above patch.
-{{% /alert %}}
+Since Flux v2.2.0, drift detection for Helm releases is available as a
+configuration option on the HelmRelease itself. Refer to the [HelmRelease
+documentation](/flux/components/helm/helmreleases/#drift-detection) for more
+information.