satisfy linter (#98)

pkg/es/index_template.go

@@ -95,9 +95,7 @@ func filterIndexTemplates(conf *cfg.Config, nameFilter string,
 
 		if len(conf.Filter) > 0 {
 			if !mapmap.NewSlicer(tpl.IndexTemplate.IndexPatterns).
-				FindSliceInSlice(conf.Filter, func(val, find string) bool {
-					return strings.Contains(val, find)
-				}) {
+				FindSliceInSlice(conf.Filter, strings.Contains) {
 				return false
 			}
 		}