[clang][nullability] Remove old overload for getNullability()

Reviewed By: gribozavr2

Differential Revision: https://reviews.llvm.org/D140626

Author: merrymeerkat

clang/include/clang/AST/Type.h

@@ -2548,8 +2548,6 @@ class alignas(8) Type : public ExtQualsTypeCommonBase {
   /// system, not as part of the canonical type, so nullability will
   /// be lost by canonicalization and desugaring.
   Optional<NullabilityKind> getNullability() const;
-  // TODO: Remove overload.
-  Optional<NullabilityKind> getNullability(const ASTContext &) const;
 
   /// Determine whether the given type can have a nullability
   /// specifier applied to it, i.e., if it is any kind of pointer type.

clang/lib/AST/Type.cpp

@@ -4157,10 +4157,6 @@ Optional<NullabilityKind> Type::getNullability() const {
   }
   return std::nullopt;
 }
-// TODO: Remove overload.
-Optional<NullabilityKind> Type::getNullability(const ASTContext &) const {
-  return getNullability();
-}
 
 bool Type::canHaveNullability(bool ResultIfUnknown) const {
   QualType type = getCanonicalTypeInternal();