Delete `absl::strings_internal::HasAbslStringify`.

Users should use `absl::HasAbslStringify` instead.

PiperOrigin-RevId: 572916854
Change-Id: Ie67e076e0335b108d23f886a28074f7557ba045a

CMake/AbseilDll.cmake

@@ -306,7 +306,6 @@ set(ABSL_INTERNAL_DLL_FILES
   "strings/internal/string_constant.h"
   "strings/internal/stringify_sink.h"
   "strings/internal/stringify_sink.cc"
-  "strings/internal/has_absl_stringify.h"
   "strings/has_absl_stringify.h"
   "strings/match.cc"
   "strings/match.h"

absl/strings/BUILD.bazel

@@ -76,7 +76,6 @@ cc_library(
         "escaping.h",
         "has_absl_stringify.h",
         "internal/damerau_levenshtein_distance.h",
-        "internal/has_absl_stringify.h",
         "internal/string_constant.h",
         "match.h",
         "numbers.h",

absl/strings/CMakeLists.txt

@@ -41,7 +41,6 @@ absl_cc_library(
     "has_absl_stringify.h"
     "internal/damerau_levenshtein_distance.h"
     "internal/string_constant.h"
-    "internal/has_absl_stringify.h"
     "match.h"
     "numbers.h"
     "str_cat.h"

absl/strings/internal/has_absl_stringify.h

-// Copyright 2022 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_HAS_ABSL_STRINGIFY_H_
-#define ABSL_STRINGS_INTERNAL_HAS_ABSL_STRINGIFY_H_
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/attributes.h"
-#include "absl/strings/has_absl_stringify.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace strings_internal {
-
-template <typename T, typename = void>
-struct ABSL_DEPRECATED("Use absl::HasAbslStringify") HasAbslStringify
-    : std::false_type {};
-
-template <typename T>
-struct ABSL_DEPRECATED("Use absl::HasAbslStringify") HasAbslStringify<
-    T, std::enable_if_t<std::is_void<decltype(AbslStringify(
-           std::declval<strings_internal::UnimplementedSink&>(),
-           std::declval<const T&>()))>::value>> : std::true_type {};
-
-}  // namespace strings_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_HAS_ABSL_STRINGIFY_H_