DERBY-6148 Wrong sort elimination when using permuted sort order

Backed out part of the patch (a line with improved compiler tree dump - only
useful for debugging) since it didn't compile on source level 1.4



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.9@1486879 13f79535-47bb-0310-9956-ffa450edef68