Remove unused parameter scm from submit_module_build
submit_module_build creates new module build and set parameter url to
ModuleBuild.scmurl. It looks scm.url could be passed to scmurl as well,
but scm is not used through out whole method. url is enough for the
purpose, hence scm is removed.
Signed-off-by: Chenxiong Qi <cqi@redhat.com>