fix bug

tasks/bamdst.wdl

@@ -11,8 +11,7 @@ task bamdst {
     command <<<
         set -o pipefail
         set -e
-        nt=$(nproc)
-        
+
         bamdst -p ${bed} -o ./ ${bam}
         cp chromosomes.report ${sample}_chromosomes.report
         cp coverage.report ${sample}_coverage.report