fix(revert-1952): fix: add validation of error to k8sWatcherErrorHandler (#1969)

Reverts #1952

Author: mereta

pkg/k8s/watcher_linux.go

@@ -43,12 +43,7 @@ func Start(ctx context.Context, k *watchers.K8sWatcher) {
 // retinaK8sErrorHandler is a custom error handler for the watcher
 // that logs the error and tags the error to easily identify
 func k8sWatcherErrorHandler(c context.Context, e error, s string, i ...interface{}) {
-	if e == nil {
-		return
-	}
-
 	errStr := e.Error()
-
 	logError := func(er, r string) {
 		logger.WithFields(logrus.Fields{
 			"underlyingError": er,