fix lint errors

src/server/routes/apiv3/import.js

@@ -242,8 +242,8 @@ module.exports = (crowi) => {
   /**
    * @swagger
    *
-   *  /import/all
-   *    post:
+   *  /import/all:
+   *    delete:
    *      tags: [Import]
    *      description: Delete all zip files
    *      responses:

src/server/service/import.js

@@ -140,6 +140,7 @@ class ImportService {
         });
 
         // exec
+        // eslint-disable-next-line no-unused-vars
         const { insertedIds, failedIds } = await execUnorderedBulkOpSafely(unorderedBulkOp);
 
         // TODO: emit event