[8822] Remove resize preloader

[rossjrw]

8822 features a resize preloader that detects what possible resizes are upcoming and sends the request ahead of time, so that they're cached by the time that resize actually needs to be performed

scp/source/scp-8822/src/controller.html

Lines 389 to 414 in e69cd70

	this.currentTask = requestIdleCallback(async () => {
	console.debug(`Preloading assertion state ${snapshot}`);
	// Delay upfront so the real iframe gets priority
	await new Promise((resolve) => setTimeout(resolve, 300));
	await new Promise((resolve) => {
	const preloadIframe = document.createElement("iframe");
	this.frames.push({ snapshot, frame: preloadIframe });
	preloadIframe.addEventListener("load", () => resolve());
	// Iframe is fully sandboxed: allow-same-origin is implicitly false, prevents the controller being resized
	preloadIframe.sandbox = true;
	preloadIframe.classList.add("preload-iframe");
	document
	.getElementById("preload-container")
	.appendChild(preloadIframe);
	preloadIframe.src =
	document.referrer +
	"/common--javascript/resize-iframe.html?" +
	"#" +
	snapshotToSize(snapshot) +
	"/" +
	location.href.replace(/^.*\//, "/").replace(/^\/+/, "");
	});

After discussion with @radian628, we found that the hash segment of the URLs are not being sent to the server anyway and are not involved in caching at all, rendering the preloader not only useless but actively harmful by sending unnecessary requests

https://github.com/scpwiki/interwiki/blob/main/js/resizeIframe.js does not do any cachebusting of its own so the preloader can literally just be removed