Remove logrus from resource watcher (#47710)

Now that gravitational/teleport.e#5165
has landed it is safe to remove the logrus logger from the resource
watcher.

lib/services/watcher.go

@@ -28,7 +28,6 @@ import (
 
  "github.com/gravitational/trace"
  "github.com/jonboulle/clockwork"
- "github.com/sirupsen/logrus"
 
  "github.com/gravitational/teleport/api/constants"
  apidefaults "github.com/gravitational/teleport/api/defaults"
@@ -90,8 +89,6 @@ func watchKindsString(kinds []types.WatchKind) string {
 type ResourceWatcherConfig struct {
  // Component is a component used in logs.
  Component string
- // TODO(tross): remove this once e has been updated.
- Log logrus.FieldLogger
  // Logger emits log messages.
  Logger *slog.Logger
  // MaxRetryPeriod is the maximum retry period on failed watchers.