fix: remove duplicated labels

[kkrypt0nn]

On some resources the labels were set twice. The labels set in the values are already in the helper method as last:

{{/*
Create basic labels
*/}}
{{- define "semaphoreui.labels" -}}
helm.sh/chart: "{{ include "semaphoreui.chart" . }}"
app.kubernetes.io/name: "{{ include "semaphoreui.name" . }}"
app.kubernetes.io/instance: "{{ .Release.Name }}"
{{- if .Chart.AppVersion }}
app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
{{- end }}
app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
{{- with .Values.labels }}
{{ toYaml . }}
{{- end }}
{{- end -}}

---

As example, when rendering the chart with the following command:

helm template test semaphore-16.2.2.tgz --set labels.hello=world

We currently get a double hello: world label:

# Source: semaphore/templates/configmap.yaml
apiVersion: v1
kind: ConfigMap

metadata:
  name: test-semaphore-config
  namespace: default
  labels:
    helm.sh/chart: "semaphore-16.2.2"
    app.kubernetes.io/name: "semaphore"
    app.kubernetes.io/instance: "test"
    app.kubernetes.io/version: "2.18.3"
    app.kubernetes.io/managed-by: "Helm"
    hello: world
    hello: world