Eliminate unused variables.
Eliminate unused variables.

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