Disable import so that hydromet can be used w/o hydromath.so
Disable import so that hydromet can be used w/o hydromath.so

Should make the code for finding/not working if hydromath.so isn't
available a bit more robust, but in the mean time disabling an import so
that other parts of hydromet can be used without requiring hydromath.

amacd31/hydromet-toolkit,amacd31/hydromet-toolkit