<<rule>> Delete: Unique Named Structural Feature in Sub-Class

<<forbid, pre>> preSuperClass : EClass <<forbid, pre>> preSuperStructuralFeature : EStructuralFeature <<forbid, pre>> name = structuralFeatureName <<preserve>> fromSubClass : EClass <<delete>> oldSubStructuralFeature : EStructuralFeature <<delete>> name = structuralFeatureName <<forbid, pre>> eSuperTypes <<forbid, pre>> eStructuralFeatures <<delete>> eContainingClass eStructuralFeatures