Removes the MIME field located at field within bufp from the header located at hdr within bufp.
If the specified field cannot be found in the list of fields associated with the header then nothing is done.
Removing the field does not destroy the field. It only detaches the
field, hiding it from the printed output. The field can be
reattached with a call to
TSMimeHdrFieldAppend(). If you
do not use the detached field you should destroy it with a call to
TSMimeHdrFieldDestroy() and release the handle field with a