'Unregister the source with the given \'name\'.
Does nothing if it is not registered.'

def unregister_snippet_source(self, name):

    for (index, (source_name, _)) in enumerate(self._snippet_sources):
        if (name == source_name):
            self._snippet_sources = (self._snippet_sources[:index] + self._snippet_sources[(index + 1):])
            break
