CmdID / PowerShell / Cmdlets / Remove
Remove-SearchDocumentFormat
Use the Remove-SearchDocumentFormat cmdlet to remove a format-specific filter from those used by Exchange search. Exchange PowerShell reference
From the Exchange PowerShell reference 4 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter uniquely identifies the format to be removed.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-ServerThe Server parameter specifies the Exchange server where you want to run this command.-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.