assetsのjs要求時にsaltを付けないように (#4358)

* No assets salt

* remove related code

src/client/app/boot.js

@@ -108,16 +108,11 @@
 		app = isMobile ? 'mobile' : 'desktop';
 	}
 
-	// Get salt query
-	const salt = localStorage.getItem('salt')
-		? `?salt=${localStorage.getItem('salt')}`
-		: '';
-
 	// Load an app script
 	// Note: 'async' make it possible to load the script asyncly.
 	//       'defer' make it possible to run the script when the dom loaded.
 	const script = document.createElement('script');
-	script.setAttribute('src', `/assets/${app}.${ver}.js${salt}`);
+	script.setAttribute('src', `/assets/${app}.${ver}.js`);
 	script.setAttribute('async', 'true');
 	script.setAttribute('defer', 'true');
 	head.appendChild(script);
@@ -155,9 +150,6 @@
 
 		localStorage.removeItem('locale');
 
-		// Random
-		localStorage.setItem('salt', Math.random().toString().substr(2, 8));
-
 		// Clear cache (service worker)
 		try {
 			navigator.serviceWorker.controller.postMessage('clear');

src/server/web/index.ts

@@ -55,7 +55,6 @@ router.get('/assets/*', async ctx => {
 	await send(ctx as any, ctx.path, {
 		root: client,
 		maxage: ms('7 days'),
-		immutable: true
 	});
 });