[Boost-build] Is there a way to de-register a suffix?

Subject: [Boost-build] Is there a way to de-register a suffix?
From: Ling Li (liling_at_[hidden])
Date: 2011-10-19 17:14:59

To deal with swig .i files, I register the suffix ".i" with a SWIG
type, and define actions with that type.  However, after upgrading
from Boost 1.44 to 1.47, bjam started to complain about "Attempting to
specify multiple types for suffix "i", Old type PREPROCESSED_C, New
type SWIG".   It seems that there's a new file at
tools/types/preprocessed.jam that associated ".i" with PREPROCESSED_C.
 Is there a way to de-register PREPROCESSED_C from ".i" so my little
SWIG trick can work?