Remove Procedure and related information from PIN and PMC

Currently there is no way to represent the Procedure in PIN and PMC
notices, in terms of a planned ProcurementObject, as there is no notion
of a corresponding PlannedProcurementPart for it (at the
`/*/cac:ProcurementProject` XPath) that can be associated with the
notice.

Affects the following fields across subtypes 1-6 and E1-E2:

BT-01-notice
BT-01(f)-Procedure
BT-01(d)-Procedure
BT-04-notice
BT-21-Procedure
BT-22-Procedure
BT-23-Procedure
BT-24-Procedure
BT-27-Procedure
BT-263-Procedure
BT-262-Procedure
BT-300-Procedure
BT-531-Procedure
BT-727-Procedure
BT-728-Procedure
BT-5071-Procedure
BT-5101(a)-Procedure
BT-5101(b)-Procedure
BT-5101(c)-Procedure
BT-5121-Procedure
BT-5131-Procedure
BT-5141-Procedure

Author: schivmeister