remove duplicate kind

Detections/http_proxy_oab_CL/HAFNIUMSuspiciousFileDownloads.yaml

@@ -1,5 +1,4 @@
 id: 03e04c97-8cae-48b3-9d2f-4ab262e4ffff
-kind: Scheduled
 name: HAFNIUM Suspicious File Downloads.
 description: |
   'This query looks for messages related to file downloads of suspicious file types. This query uses the Exchange HttpProxy AOBGeneratorLog, you will need to onboard this log as a custom log under the table http_proxy_oab_CL before using this query.