Remove extra type, fix deleteDownload type for useSocket

frontend/src/components/Demo.tsx

@@ -8,11 +8,6 @@ type DemoProps = {
   class?: ClassValue;
 };
 
-type SessionData = {
-  id: string;
-  downloads: string[];
-};
-
 const Demo = ({ class: className }: DemoProps) => {
   const { id, downloads } = useSocket();
   // TODO: Toasts

frontend/src/components/useSocket.ts

@@ -17,7 +17,7 @@ interface UseSocketResult {
   id: number | null;
   executables: Executable[] | null;
   downloads: Download[] | null;
-  deleteDownload: (id: string) => void;
+  deleteDownload: (id: number) => void;
 }
 
 function useSocket(): UseSocketResult {