remove unnecessary comment and line

src/server/service/import.js

@@ -133,14 +133,12 @@ class ImportService {
     const zipFileStats = [];
     const parseZipFilePromises = zipFiles.map((file) => {
       const zipFile = this.getFile(file);
-      // return this.growiBridgeService.parseZipFile(zipFile);
       return this.growiBridgeService.parseZipFile(zipFile);
     });
     for await (const stat of parseZipFilePromises) {
       zipFileStats.push(stat);
     }
 
-
     // filter null object (broken zip)
     const filtered = zipFileStats
       .filter(zipFileStat => zipFileStat != null);