API: Remove redundant Read status from message (always true)

storage/database.go

@@ -431,7 +431,6 @@ func GetMessage(id string) (*Message, error) {
 	obj := Message{
 		ID:         id,
 		MessageID:  messageID,
-		Read:       true,
 		From:       from,
 		Date:       date,
 		To:         addressToSlice(env, "To"),

storage/structs.go

@@ -15,8 +15,6 @@ type Message struct {
 	ID string
 	// Message ID
 	MessageID string
-	// Read status
-	Read bool
 	// From address
 	From *mail.Address
 	// To addresses