Revert "a test to illustrate a bug in usp.c"
Revert "a test to illustrate a bug in usp.c"

This reverts commit 846ee731524ad508fb627a8b1475ddc7aa618dc3.

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs