Address comments

Author: wenxuan0923

src/aks-preview/azext_aks_preview/managed_cluster_decorator.py

@@ -5235,6 +5235,9 @@ def update_agentpool_profile(self, mc: ManagedCluster) -> ManagedCluster:
 
         # Preview-specific change: an AKS ManagedCluster of automatic
         # cluster with hosted system components may not have agent pools
+        # When transitioning from hosted to non-hosted automatic clusters,
+        # customers must first add a system node pool before disabling
+        # the hosted system profile.
         if not mc.agent_pool_profiles:
             if mc.hosted_system_profile and mc.hosted_system_profile.enabled:
                 return mc
@@ -6578,21 +6581,6 @@ def update_upgrade_settings(self, mc: ManagedCluster) -> ManagedCluster:
 
         return mc
 
-    def update_nodepool_taints_mc(self, mc: ManagedCluster) -> ManagedCluster:
-        self._ensure_mc(mc)
-
-        # update nodepool taints for all nodepools
-        nodepool_taints = self.context.get_nodepool_taints()
-        if nodepool_taints is not None:
-            if not mc.agent_pool_profiles:
-                raise UnknownError(
-                    "Encounter an unexpected error while getting agent pool profiles from the "
-                    "cluster in the process of updating agentpool profile."
-                )
-            for agent_profile in mc.agent_pool_profiles:
-                agent_profile.node_taints = nodepool_taints
-        return mc
-
     def update_nodepool_initialization_taints_mc(self, mc: ManagedCluster) -> ManagedCluster:
         self._ensure_mc(mc)
 
@@ -7299,8 +7287,6 @@ def update_mc_profile_preview(self) -> ManagedCluster:
         mc = self.update_auto_upgrade_profile(mc)
         # update cluster upgrade settings profile
         mc = self.update_upgrade_settings(mc)
-        # update nodepool taints
-        mc = self.update_nodepool_taints_mc(mc)
         # update nodepool initialization taints
         mc = self.update_nodepool_initialization_taints_mc(mc)
         # update acns in network_profile