removed dead code

frontend/src/lib/events.ts

@@ -1,10 +0,0 @@
-export function on(eventType: string, listener: any) {
-    document.addEventListener(eventType, listener)
-}
-
-export const serverStates = {
-    PROC_DOWNLOAD: 'download',
-    PROC_MERGING: 'merging',
-    PROC_ABORT: 'abort',
-    PROG_DONE: 'status_done',
-}

frontend/src/lib/httpClient.ts

@@ -1,11 +1,3 @@
-import * as E from 'fp-ts/Either'
-import { pipe } from 'fp-ts/function'
-
-type FetchInit = {
-  url: string,
-  opt?: RequestInit
-}
-
 export async function ffetch<T>(
   url: string,
   onSuccess: (res: T) => void,