Removed an extraneous flush() call that was hurting performance.
Removed an extraneous flush() call that was hurting performance.

broadinstitute/picard,annkupi/picard,broadinstitute/picard,nh13/picard,annkupi/picard,broadinstitute/picard,annkupi/picard,nh13/picard,nh13/picard,alecw/picard,nh13/picard,alecw/picard,annkupi/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard,alecw/picard