Don't require explicit getter for threadId

domain/src/main/java/model/Message.kt

@@ -45,7 +45,6 @@ open class Message : RealmObject() {
     @Index
     @Deprecated("This is only here for Realm to access - it should be ignored in our codebase")
     var threadId: Long = 0
-        get() = conversation?.id ?: 0
 
     // The MMS-SMS content provider returns messages where duplicate ids can exist. This is because
     // SMS and MMS are stored in separate tables. We can't use these ids as our realm message id