Docs: Removed unnecessary s3 value from example (#8017)

**What this PR does / why we need it**:
removes a confusing value field that isn't necessary. 
more clarity

closes #8036

**Checklist**
- [x] Reviewed the `CONTRIBUTING.md` guide
- [x] Documentation added
- [x] Tests updated
- [ ] `CHANGELOG.md` updated
- [x] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/upgrading/_index.md`

docs/sources/installation/helm/install-scalable/index.md

@@ -50,7 +50,6 @@ It is not possible to run the scalable mode with the `filesystem` storage.
           admin: admin
         type: s3
         s3:
-          s3: <WHAT SHOULD GO HERE?>
           endpoint: <endpoint>
           region: <AWS region>
           secretAccessKey: <AWS secret access key>