Remove implementedProperties

Author: asamuzaK

.gitignore

@@ -1,4 +1,4 @@
 node_modules
 npm-debug.log
-lib/generated/implementedProperties.js
 lib/generated/properties.js
+lib/generated/propertyList.js

lib/CSSStyleProperties.js

@@ -1,7 +1,6 @@
 "use strict";
 
 const { CSSStyleDeclaration } = require("./CSSStyleDeclaration");
-const implementedProperties = require("./generated/implementedProperties");
 const generatedProperties = require("./generated/properties");
 const propertyList = require("./generated/propertyList");
 const { dashedToCamelCase } = require("./utils/camelize");
@@ -25,7 +24,7 @@ Object.defineProperties(CSSStyleProperties.prototype, generatedProperties);
 
 // Additional properties
 for (const property of propertyList.keys()) {
-  if (!implementedProperties.has(property)) {
+  if (!Object.hasOwn(generatedProperties, property)) {
     const declaration = getPropertyDescriptor(property);
     Object.defineProperty(CSSStyleProperties.prototype, property, declaration);
     const camel = dashedToCamelCase(property);