<<rule>> Delete: Unique Named Structural Feature in Super-Class
<<preserve>>
fromSuperClass : EClass
<<delete>>
oldSuperStructuralFeature : EStructuralFeature
<<delete>> name = structuralFeatureName
<<forbid, pre>>
preSubClass : EClass
<<forbid, pre>>
preSubStructuralFeature : EStructuralFeature
<<forbid, pre>> name = structuralFeatureName
<<forbid, pre>>
eSuperTypes
<<forbid, pre>>
eStructuralFeatures
<<delete>>
eContainingClass
eStructuralFeatures