Remove an old hack

This hack fixed a bug we don't have any more so it can go.

Change-Id: I0308561713c364b28e61cba1d779bd7fb17cc753
Lower default phrase window to 512

Lower the defualt phrase check from 1024 to 512.  This should lower the io
usage of the phrase check by simply requiring half the data per query.  This
will lower the accuracy somewhat but it shouldn't be horrible.

Change-Id: I965f5b82e12b5ad592de0dbeff9dfd37a525292c
Merge "Lower default phrase window to 512"