Fix the matlab parser breaking horribly on case sensitive systems.

Due to how the matlab grammar was setup, things would break horribly on systems
with case sensitive file names.  This occurred as some elements had names
differing only by case, which both Antlr and Java were fine with, but relied
on the system have case insensitive file names.  Mac/Windows would thus break
in most cases, along with Dropbox.

Fix by removing these names.  I don't use them, and the one useful case is
handled differently, which shouldn't cause issues in the future.