AST: Remove ProtocolConformanceRef::getInheritedConformanceRef()

Author: slavapestov

include/swift/AST/ProtocolConformanceRef.h

@@ -153,11 +153,6 @@ class ProtocolConformanceRef {
   /// Get any additional requirements that are required for this conformance to
   /// be satisfied.
   ArrayRef<Requirement> getConditionalRequirements() const;
-  
-  /// If this is a conformance reference for a protocol that inherits other
-  /// protocols, get a reference to the related conformance for the inherited
-  /// protocol.
-  ProtocolConformanceRef getInheritedConformanceRef(ProtocolDecl *base) const;
 };
 
 } // end namespace swift

lib/AST/ProtocolConformance.cpp

@@ -487,37 +487,6 @@ ProtocolConformanceRef::getConditionalRequirements() const {
     return {};
 }
 
-ProtocolConformanceRef
-ProtocolConformanceRef::getInheritedConformanceRef(ProtocolDecl *base) const {
-  if (isAbstract()) {
-    assert(getRequirement()->inheritsFrom(base));
-    return ProtocolConformanceRef(base);
-  }
-
-  auto concrete = getConcrete();
-  auto proto = concrete->getProtocol();
-  auto path =
-    proto->getGenericSignature()->getConformanceAccessPath(
-                                            proto->getSelfInterfaceType(), base);
-  ProtocolConformanceRef result = *this;
-  Type resultType = concrete->getType();
-  bool first = true;
-  for (const auto &step : path) {
-    if (first) {
-      assert(step.first->isEqual(proto->getSelfInterfaceType()));
-      assert(step.second == proto);
-      first = false;
-      continue;
-    }
-
-    result =
-        result.getAssociatedConformance(resultType, step.first, step.second);
-    resultType = result.getAssociatedType(resultType, step.first);
-  }
-
-  return result;
-}
-
 void NormalProtocolConformance::differenceAndStoreConditionalRequirements()
     const {
   switch (CRState) {