remove private property with respect to the Unique philosophy

experimental/class-features.md

@@ -21,24 +21,20 @@ interface PropertyDefinition <: Node {
     value: Expression | null;
     computed: boolean;
     static: boolean;
-    private: boolean;
 }
 ```
 
-- When `private` is `true`, `computed` must be `false` and `key` must be a `PrivateIdentifier`.
-- When `private` is `false`, `key` must be an `Expression` and can not be a `PrivateIdentifier`.
+- When `key` is a `PrivateIdentifier`, `computed` must be `false`.
 
 ## MethodDefinition
 
 ```js
 extend interface MethodDefinition {
     key: Expression | PrivateIdentifier;
-    private: boolean;
 }
 ```
 
-- When `private` is `true`, `computed` must be `false`, `key` must be a `PrivateIdentifier`, `kind` can not be `"constructor"`.
-- When `private` is `false`, `key` must be an `Expression` and can not be a `PrivateIdentifier`.
+- When `key` is a `PrivateIdentifier`, `computed` must be `false` and `kind` can not be `"constructor"`.
 
 ### PrivateIdentifier
 
@@ -49,18 +45,16 @@ interface PrivateIdentifier <: Node {
 }
 ```
 
-A private name refers to private class elements. For a private name `#a`, its `name` is `a`.
+A private identifier refers to private class elements. For a private name `#a`, its `name` is `a`.
 
 ```js
 extend interface MemberExpression {
-    private: boolean;
     property: Expression | PrivateIdentifier;
 }
 ```
 
-- When `private` is `true`, `property` must be a `PrivateIdentifier`, `computed` must be `false`.
-- When `private` is `false`, `property` must be an `Expression` and can not be a `PrivateIdentifier`.
-- When `object` is a `Super`, `private` must be `false`.
+- When `property` is a `PrivateIdentifier`, `computed` must be `false`.
+- When `object` is a `Super`, `property` can not be a `PrivateIdentifier`.
 
 [Class Fields]: https://github.com/tc39/proposal-class-fields
 [Static Class Features]: https://github.com/tc39/proposal-static-class-features/