Header fields to be removed from sender file

hi friends,

In my scenario the file with which i am testing is having some header fields but there is no mapping for those header fields .

i want those header fields to be removed and only the content which is needed  to be processed to the target side.below are screen shots. can any one help me in how to remove these header fields.  source is FTP and target is SFTP.

1.this is the file used for testing ,the one marked in blue is the content that should be passed

2. the target file should look like below screenshot  with out any headers

3. but its comming like below screensht with header fields

thanks.