How to set null config values in helm charts via pulumi

I'm trying to configure a helm chart via pulumi and golang. According to the helm chart documentation default components can be removed by setting the config to null. I managed to set the desired config values for the helm chart in my pulumi script, but it's not possible to set config values to null.

Update:

It seems that the custom abstraction layer on top of the pulumi helm chart resource could not handle the config. I have added a minimal working example which uses the helm chart resource directly and its working as expected:

package main

import (
	helmv3 "github.com/pulumi/pulumi-kubernetes/sdk/v3/go/kubernetes/helm/v3"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := helmv3.NewChart(ctx, "otel-collect", helmv3.ChartArgs{
			Chart:   pulumi.String("opentelemetry-collector"),
			Version: pulumi.String("0.31.1"),
			FetchArgs: helmv3.FetchArgs{
				Repo: pulumi.String("https://open-telemetry.github.io/opentelemetry-helm-charts"),
			},
			Values: pulumi.Map{
				"fullnameOverride": pulumi.String("otel-collector"),
				"mode":             pulumi.String("deployment"),
				"config": pulumi.Map{
					"receivers": pulumi.Map{
						"jaeger": pulumi.Map{
							"protocols": pulumi.Map{
								"thrift_compact": nil,
							},
						},
						"prometheus": nil,
					},
					"service": pulumi.Map{
						"pipelines": pulumi.Map{
							"metrics": nil,
						},
					},
				},
			},
		})
		if err != nil {
			return err
		}

		return nil
	})
}

In this scenario I want to set the prometheus config to null but when this chart is deployed the default values for prometheus are set. I have also tried "prometheus": pulumi.Any(nil), but this also does not change the config.

The issue was caused by an abstraction layer I put on top of the pulumi helm resources.