[NFC] Remove TypeLoc::setInvalidType

Author: AnthonyLatsis

include/swift/AST/TypeLoc.h

@@ -62,7 +62,6 @@ class alignas(1 << TypeReprAlignInBits) TypeLoc final {
 
   bool isNull() const { return getType().isNull() && TyR == nullptr; }
 
-  void setInvalidType(ASTContext &C);
   void setType(Type Ty);
 
   friend llvm::hash_code hash_value(const TypeLoc &owner) {

lib/AST/ASTContext.cpp

@@ -3886,10 +3886,6 @@ CanType OpenedArchetypeType::getAny(Type existential) {
   return OpenedArchetypeType::get(existential);
 }
 
-void TypeLoc::setInvalidType(ASTContext &C) {
-  Ty = ErrorType::get(C);
-}
-
 void SubstitutionMap::Storage::Profile(
                                llvm::FoldingSetNodeID &id,
                                GenericSignature genericSig,

lib/Sema/TypeCheckDeclPrimary.cpp

@@ -1851,7 +1851,7 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
       if (!computeAutomaticEnumValueKind(ED)) {
         DE.diagnose(ED->getInherited().front().getSourceRange().Start,
                     diag::raw_type_not_literal_convertible, rawTy);
-        ED->getInherited().front().setInvalidType(getASTContext());
+        ED->getInherited().front().setType(ErrorType::get(getASTContext()));
       }
 
       // We need at least one case to have a raw value.