Remove temporal polyfill because we're on Node.js 26

Resolves #539

Author: holzmaster

package-lock.json

@@ -31,7 +31,6 @@
   },
   "dependencies": {
     "@discordjs/voice": "^0.19.2",
-    "@js-temporal/polyfill": "^0.5.1",
     "@napi-rs/canvas": "1.0.0",
     "@resvg/resvg-js": "^2.6.2",
     "@sentry/node": "^10.51.0",

package.json

@@ -1,5 +1,3 @@
-import { Temporal as PolyfillTemporal } from "@js-temporal/polyfill";
-
 declare global {
     // type polyfill for Math.sumPrecise (currently in stage 2):
     // https://github.com/tc39/proposal-math-sum
@@ -15,15 +13,6 @@ declare global {
     }
 }
 
-globalThis.Temporal = PolyfillTemporal as typeof Temporal;
-
-// TODO: Remove this once temporal is available in Node.js, see: https://github.com/nodejs/node/issues/57127
-if (typeof Date.prototype.toTemporalInstant !== "function") {
-    Date.prototype.toTemporalInstant = function () {
-        return Temporal.Instant.fromEpochMilliseconds(this.getTime());
-    };
-}
-
 if (typeof Math.sumPrecise !== "function") {
     // intentionally very cheap implementation. But does the thing.
     Math.sumPrecise = (values: number[]) => values.reduce((a, b) => a + b, 0);