Remove all references to sevenbridges tags
RabixComposer, which uses the sevenbridges namespace and sbg tags, cannot
handle CWL version 1.2 files. Removed all references to the namespace and tags.
RabixComposer, which uses the sevenbridges namespace and sbg tags, cannot
handle CWL version 1.2 files. Removed all references to the namespace and tags.