AST: Remove ProtocolConformanceRef::getAssociatedType()

Author: slavapestov

include/swift/AST/ProtocolConformance.h

@@ -363,10 +363,6 @@ class alignas(1 << DeclAlignInBits) ProtocolConformance
   /// Retrieve the protocol conformance for the inherited protocol.
   ProtocolConformance *getInheritedConformance(ProtocolDecl *protocol) const;
 
-  /// Given a dependent type expressed in terms of the self parameter,
-  /// map it into the context of this conformance.
-  Type getAssociatedType(Type assocType) const;
-
   /// Given that the requirement signature of the protocol directly states
   /// that the given dependent type must conform to the given protocol,
   /// return its associated conformance.

lib/AST/ProtocolConformance.cpp

@@ -623,14 +623,6 @@ void NormalProtocolConformance::setTypeWitness(AssociatedTypeDecl *assocType,
   TypeWitnesses[assocType] = {type, typeDecl};
 }
 
-Type ProtocolConformance::getAssociatedType(Type assocType) const {
-  assert(assocType->isTypeParameter() &&
-         "associated type must be a type parameter");
-
-  ProtocolConformanceRef ref(const_cast<ProtocolConformance*>(this));
-  return ref.getAssociatedType(assocType);
-}
-
 ProtocolConformanceRef
 ProtocolConformance::getAssociatedConformance(Type assocType,
                                               ProtocolDecl *protocol) const {

lib/AST/ProtocolConformanceRef.cpp

@@ -210,13 +210,6 @@ Type ProtocolConformanceRef::getTypeWitness(AssociatedTypeDecl *assocType,
   return DependentMemberType::get(conformingType, assocType);
 }
 
-Type ProtocolConformanceRef::getAssociatedType(Type assocType) const {
-  if (isInvalid())
-    return ErrorType::get(assocType->getASTContext());
-
-  return assocType.subst(SubstitutionMap::getProtocolSubstitutions(*this));
-}
-
 ProtocolConformanceRef
 ProtocolConformanceRef::getAssociatedConformance(Type assocType,
                                                  ProtocolDecl *protocol) const {