Remove dead code.

git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinx4@12565 94700074-3cef-4d97-a70e-9c8c206c02f5
Speed-up dynamic trigram model computation.

Sort sequence of words to prevent full-scan.

git-svn-id: svn+ssh://svn.code.sf.net/p/cmusphinx/code/trunk/sphinx4@12566 94700074-3cef-4d97-a70e-9c8c206c02f5