Fix default Entity implementations

Author: colemancda

Sources/CoreModel/Decoder.swift

@@ -9,7 +9,7 @@ import Foundation
 
 // MARK: - Default Codable Implementation
 
-extension Entity where Self: Decodable, Self.ID: Decodable, Self.ID: ObjectIDConvertible {
+extension Entity where Self: Decodable {
 
     public init(
         from model: ModelData

Sources/CoreModel/Encoder.swift

@@ -7,7 +7,7 @@
 
 import Foundation
 
-extension Entity where Self: Encodable, Self.ID: Encodable {
+extension Entity where Self: Encodable {
 
     public func encode() throws -> ModelData {
         try encode(log: nil)