No longer needed

src/date.ts

@@ -117,10 +117,6 @@ export interface MwnDateStatic {
 	populateLocaleData(lang?: string): Promise<void>;
 }
 
-type startWith<S extends string, O extends Record<string, any>> = {
-	[key in keyof O]: key extends `${S}${string}` ? O[key] : never;
-};
-
 export default function (bot: mwn) {
 	class XDate extends Date implements MwnDate {
 		constructor(...args: ConstructorParameters<DateConstructor>);
@@ -378,18 +374,6 @@ export default function (bot: mwn) {
 		}
 	}
 
-	// Tweak set* methods (setHours, setUTCMinutes, etc) so that they
-	// return the modified XDate object rather than the seconds-since-epoch
-	// representation which is what JS Date() gives
-	(<(keyof startWith<'set', XDate>)[]>Object.getOwnPropertyNames(Date.prototype))
-		.filter((f) => typeof f === 'string' && f.startsWith('set'))
-		.forEach((func) => {
-			let proxy = XDate.prototype[func];
-			XDate.prototype[func] = function (...args: Parameters<XDate[typeof func]>) {
-				return proxy.call(this, ...args);
-			};
-		});
-
 	return XDate as MwnDateStatic;
 }