remove logutil from logging.md

Author: estroz

doc/dev/logging.md

@@ -8,13 +8,12 @@ Operators set the logger for all operator logging in [`cmd/manager/main.go`][cod
 
 ```Go
 import (
-	"github.com/operator-framework/operator-sdk/pkg/logutil"
 	logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
 )
 
 func main() {
   logf.SetLogger(logf.ZapLogger(false))
-  log := logutil.SDKLog.WithName("cmd")
+  log := logf.Log.WithName("cmd")
 
   ...
 
@@ -37,12 +36,16 @@ An example from [`memcached_controller.go`][code_memcached_controller]:
 ```Go
 package memcached
 
+import (
+	logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
+)
+
 // Set a global logger for the memcached package. Each log record produced
 // by this logger will have an identifier containing "controller_memcached".
 // These names are hierarchical; the name attached to memcached log statements
 // will be "operator-sdk.controller_memcached" because SDKLog has name
 // "operator-sdk".
-var log = logutil.SDKLog.WithName("controller_memcached")
+var log = logf.Log.WithName("controller_memcached")
 
 func (r *ReconcileMemcached) Reconcile(request reconcile.Request) (reconcile.Result, error) {
   // Create a logger for Reconcile() that includes "Request.Namespace"