Update file.yml

rfcs/text/0048/file.yml

@@ -9,13 +9,6 @@
     and/or file events (e.g., those produced by File Integrity Monitoring [FIM] products or services).
     File fields provide details about the affected file associated with the event or metric.
   type: group
-  reusable:
-    top_level: true
-    expected:
-      - at: threat.indicator
-        as: file
-      - at: threat.enrichments.indicator
-        as: file
   fields:
     - name: origin_referrer_url
       level: extended
@@ -35,4 +28,4 @@
       level: extended
       type: short
       description: Windows Zone Identifier for a file.
-      example: 3      
+      example: 3