Tidying up unused imports and variables
Tidying up unused imports and variables

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