Remove references to jsonschema
Remove references to jsonschema

chapmanb/cwltool,chapmanb/cwltool,jeremiahsavage/cwltool,common-workflow-language/cwltool,jeremiahsavage/cwltool,SciDAP/cwltool,jeremiahsavage/cwltool,dleehr/cwltool,chapmanb/cwltool,SciDAP/cwltool,jeremiahsavage/cwltool,dleehr/cwltool,dleehr/cwltool,SciDAP/cwltool,dleehr/cwltool,SciDAP/cwltool,common-workflow-language/cwltool,common-workflow-language/cwltool,chapmanb/cwltool