Remove out-dated comment in cholesky test.
Remove out-dated comment in cholesky test.

--HG--
extra : transplant_source : %D9%DEz%8C%5B5%EFE%7C%925fiv%22%21%8EQw%5E

rotorliu/eigen,mjbshaw/Eigen,madlib/eigen_backup,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,rotorliu/eigen,mjbshaw/Eigen,madlib/eigen_backup,mjbshaw/Eigen,madlib/eigen_backup,mjbshaw/Eigen