Remove hardcoded entrypoint in kustomize (#950)

This was changed in our container image after we switched over to ko.
Apparently we missed the fix in the kustomize file.
Solves: #928

Author: NissesSenap

deploy/base/deployment.yaml

@@ -34,8 +34,6 @@ spec:
             - --health-probe-bind-address=:8081
             - --metrics-bind-address=127.0.0.1:8080
             - --leader-elect
-          command:
-            - /manager
           image: ghcr.io/grafana-operator/grafana-operator:v5.0.0
           imagePullPolicy: Always
           livenessProbe: