You can delete individual features from any of the three weld feature groups . You cannot delete the actual weld feature groups.
When you delete a weld bead feature , its associated welding symbol is also deleted. The weld bead feature annotations and any drawing welding symbols associated with the weld bead feature will be deleted the next time the drawing updates.
When you delete assembly features from a weld feature group, you might need to reapply constraints or recreate features.