Remove unused scheme passed to reconcilers (#121)

The scheme is part of the manager so we do not need to pass it in the
struct.

internal/controller/nbsetupkey_controller.go

@@ -24,7 +24,6 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -37,7 +36,7 @@ import (
 // NBSetupKeyReconciler reconciles a NBSetupKey object
 type NBSetupKeyReconciler struct {
 	client.Client
-	Scheme            *runtime.Scheme
+
 	ReferencedSecrets map[string]types.NamespacedName
 }