refactor: use cookie instead of local storage for share token

backend/src/file/guard/fileDownload.guard.ts

@@ -1,17 +0,0 @@
-import { CanActivate, ExecutionContext, Injectable } from "@nestjs/common";
-import { Request } from "express";
-import { FileService } from "src/file/file.service";
-
-@Injectable()
-export class FileDownloadGuard implements CanActivate {
-  constructor(private fileService: FileService) {}
-
-  async canActivate(context: ExecutionContext) {
-    const request: Request = context.switchToHttp().getRequest();
-
-    const token = request.query.token as string;
-    const { shareId } = request.params;
-
-    return this.fileService.verifyFileDownloadToken(shareId, token);
-  }
-}