Revert "[v2] Add ES config comments (jaegertracing#6110)"

This reverts commit 27d5491.

Author: yurishkuro

pkg/es/config/config.go

@@ -40,11 +40,7 @@ const (
 // IndexOptions describes the index format and rollover frequency
 type IndexOptions struct {
 	// Priority contains the priority of index template (ESv8 only).
-	Priority int64 `mapstructure:"priority"`
-	// DateLayout contains the format string used to format current time to part of the index name.
-	// For example, "2006-01-02" layout will result in "jaeger-spans-yyyy-mm-dd".
-	// If not specified, the default value is "2006-01-02".
-	// See https://pkg.go.dev/time#Layout for more details on the syntax.
+	Priority   int64  `mapstructure:"priority"`
 	DateLayout string `mapstructure:"date_layout"`
 	// Shards is the number of shards per index in Elasticsearch.
 	Shards int64 `mapstructure:"shards"`