remove default disk size

defaults

     "maximum_fraction_of_muliplelocationmapped_reads":"0.95",
     "fastqc_cluster_config": "OnDemand bcs.b2.3xlarge img-ubuntu-vpc",
     "fastqc_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/fastqc:v0.11.5",
-    "fastqc_disk_size": "150",
     "qualimapBAMqc_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/qualimap:2.0.0",
     "qualimapBAMqc_cluster_config": "OnDemand bcs.a2.7xlarge img-ubuntu-vpc",
-    "qualimapBAMqc_disk_size": "500",
     "qualimapRNAseq_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/qualimap:2.0.0",
     "qualimapRNAseq_cluster_config": "OnDemand bcs.a2.7xlarge img-ubuntu-vpc",
-    "qualimapRNAseq_disk_size": "500",
     "fastqscreen_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/fastqscreen:0.12.0",
     "fastqscreen_cluster_config": "OnDemand bcs.b2.3xlarge img-ubuntu-vpc",
     "screen_ref_dir": "oss://pgx-reference-data/fastq_screen_reference/",
     "fastq_screen_conf": "oss://pgx-reference-data/fastq_screen_reference/fastq_screen.conf",
-    "fastqscreen_disk_size": "200",
     "ref_dir": "oss://chinese-quartet/quartet-storage-data/reference_data/",
     "multiqc_cluster_config": "OnDemand bcs.b2.3xlarge img-ubuntu-vpc",
     "multiqc_docker": "registry-vpc.cn-shanghai.aliyuncs.com/pgx-docker-registry/multiqc:v1.8",
-    "multiqc_disk_size": "100",
     "ballgown_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/pgx-ballgown:0.0.1",
     "ballgown_cluster": "OnDemand bcs.a2.large img-ubuntu-vpc"
     }