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How to disable the file upload feature in Liferay 6.2
I am using Liferay 6.2.
 My feedback page has a file upload
  feature.
 I don't want to receive any attachments; I just want
  users to submit their feedback without uploading files.
 Users can
  submit feedback without logging in, but they are still able to upload
  files to the server. How can I disable this feature?