Remove the maintainer list in Helm Chart README (apache#1962)

Author: flyrain

helm/polaris/Chart.yaml

@@ -30,7 +30,7 @@ sources:
 keywords:
   - polaris
   - iceberg
-maintainers:
+maintainers:  # Maintainers section is kept only to satisfy the Helm Chart Spec and downstream linters.
   - name: MonkeyCanCode
   - name: adutra
   - name: collado-mike

helm/polaris/README.md

@@ -33,14 +33,6 @@ A Helm chart for Apache Polaris (incubating).
 
 **Homepage:** <https://polaris.apache.org/>
 
-## Maintainers
-* [MonkeyCanCode](https://github.com/MonkeyCanCode)
-* [adutra](https://github.com/adutra)
-* [collado-mike](https://github.com/collado-mike)
-* [gerrit-k](https://github.com/gerrit-k)
-* [snazy](https://github.com/snazy)
-* [flyrain](https://github.com/flyrain)
-
 ## Source Code
 
 * <https://github.com/apache/polaris>