refactor: cache since, dont dedupe by host

src/utils.ts

@@ -94,22 +94,3 @@ export async function openFile(): Promise<File | undefined> {
 export function getTagValues(tags: Array<string[]>, tag: string) {
   return tags.filter((t) => t.at(0) === tag).map((t) => t.at(1));
 }
-
-export function dedupeByHost(events: Array<NostrEvent>) {
-  const { result } = events.reduce(
-    ({ result, seen }, ev) => {
-      const host = getHost(ev);
-      if (seen.has(host)) {
-        return { result, seen };
-      }
-      result.push(ev);
-      seen.add(host);
-      return { result, seen };
-    },
-    {
-      result: [],
-      seen: new Set(),
-    },
-  );
-  return result;
-}