Merge pull request 'docs: remove incorrect dev installation instructions' (#23) from docs/remove-sidecar-instructions into main

Reviewed-on: farhoodliquor/headlamp-polaris-plugin#23

README.md

@@ -85,56 +85,7 @@ npx @kinvolk/headlamp-plugin extract . /headlamp/plugins
 
 ## Installing Dev/Preview Versions
 
-Dev preview versions (e.g., `v0.2.0-dev.4`) are published to [GitHub Releases](https://github.com/cpfarhood/headlamp-polaris-plugin/releases) but are **not available via ArtifactHub**. These versions contain experimental features and are intended for testing.
-
-To install a dev version, use the direct URL method:
-
-### Sidecar container pattern (recommended)
-
-Create a ConfigMap with the dev version URL:
-
-```yaml
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: headlamp-plugin-config
-  namespace: kube-system
-data:
-  plugin.yml: |
-    plugins:
-      - url: https://github.com/cpfarhood/headlamp-polaris-plugin/releases/download/v0.2.0-dev.4/headlamp-polaris-plugin-0.2.0-dev.4.tar.gz
-```
-
-Then configure Headlamp to use a sidecar container that installs from this config:
-
-```yaml
-# In Headlamp Helm values or deployment
-containers:
-  - name: headlamp-plugin-installer
-    image: node:lts-alpine
-    command: ["/bin/sh", "-c"]
-    args:
-      - |
-        npm install -g @kinvolk/headlamp-plugin
-        headlamp-plugin install --config /config/plugin.yml
-    volumeMounts:
-      - name: plugins
-        mountPath: /headlamp/plugins
-      - name: plugin-config
-        mountPath: /config
-volumes:
-  - name: plugins
-    emptyDir: {}
-  - name: plugin-config
-    configMap:
-      name: headlamp-plugin-config
-```
-
-### Manual download
-
-Browse [GitHub Releases](https://github.com/cpfarhood/headlamp-polaris-plugin/releases), download the dev version tarball, and extract it to your Headlamp plugins directory.
-
-**Note:** Dev versions are tagged with the `-dev.N` suffix and may introduce breaking changes or unstable features. Use stable versions for production deployments.
+Dev preview versions are **not currently available** through the Headlamp plugin manager. Stable versions can be installed from ArtifactHub via the plugin manager UI.
 
 ## RBAC / Security Setup