AST: Remove SubscriptDecl::getIndicesInterfaceType()

Author: slavapestov

include/swift/AST/Decl.h

@@ -4870,9 +4870,6 @@ class SubscriptDecl : public GenericContext, public AbstractStorageDecl {
   const ParameterList *getIndices() const { return Indices; }
   void setIndices(ParameterList *p);
 
-  /// Retrieve the interface type of the indices.
-  Type getIndicesInterfaceType() const;
-
   /// \brief Retrieve the type of the element referenced by a subscript
   /// operation.
   Type getElementInterfaceType() const;

include/swift/SIL/TypeLowering.h

@@ -802,7 +802,6 @@ class TypeConverter {
                                            bool isNonObjC = false);
   AbstractionPattern getAbstractionPattern(SubscriptDecl *subscript,
                                            bool isNonObjC = false);
-  AbstractionPattern getIndicesAbstractionPattern(SubscriptDecl *subscript);
   AbstractionPattern getAbstractionPattern(EnumElementDecl *element);
 
   SILType getLoweredTypeOfGlobal(VarDecl *var);

lib/AST/Decl.cpp

@@ -4913,13 +4913,6 @@ void SubscriptDecl::setIndices(ParameterList *p) {
     Indices->setDeclContextOfParamDecls(this);
 }
 
-Type SubscriptDecl::getIndicesInterfaceType() const {
-  auto indicesTy = getInterfaceType();
-  if (indicesTy->is<ErrorType>())
-    return indicesTy;
-  return indicesTy->castTo<AnyFunctionType>()->getInput();
-}
-
 Type SubscriptDecl::getElementInterfaceType() const {
   auto elementTy = getInterfaceType();
   if (elementTy->is<ErrorType>())

lib/SIL/AbstractionPattern.cpp

@@ -51,16 +51,6 @@ TypeConverter::getAbstractionPattern(SubscriptDecl *decl, bool isNonObjC) {
                                 ->getCanonicalType());
 }
 
-AbstractionPattern
-TypeConverter::getIndicesAbstractionPattern(SubscriptDecl *decl) {
-  CanGenericSignature genericSig;
-  if (auto sig = decl->getGenericSignatureOfContext())
-    genericSig = sig->getCanonicalSignature();
-  auto indicesTy = decl->getIndicesInterfaceType();
-  auto indicesCanTy = indicesTy->getCanonicalType(genericSig);
-  return AbstractionPattern(genericSig, indicesCanTy);
-}
-
 static const clang::Type *getClangType(const clang::Decl *decl) {
   if (auto valueDecl = dyn_cast<clang::ValueDecl>(decl)) {
     return valueDecl->getType().getTypePtr();