diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -763,14 +763,6 @@
                                  # Use the ISO conforming behaviour for conversion
                                  # in printf, scanf.
                                  _CRT_STDIO_ISO_WIDE_SPECIFIERS)
-    # Clang-cl shared builds don't support the experimental library.
-    # To avoid linker errors the format_error destructor is inlined for the
-    # dylib. Users can never use format in this mode.
-    # TODO FMT Remove when format becomes mainline.
-    if (LIBCXX_ENABLE_SHARED)
-      target_compile_definitions(${target} PRIVATE
-                                 _LIBCPP_INLINE_FORMAT_ERROR_DTOR)
-    endif()
   endif()
 endfunction()
 
diff --git a/libcxx/include/__format/format_error.h b/libcxx/include/__format/format_error.h
--- a/libcxx/include/__format/format_error.h
+++ b/libcxx/include/__format/format_error.h
@@ -28,14 +28,7 @@
       : runtime_error(__s) {}
   _LIBCPP_HIDE_FROM_ABI explicit format_error(const char* __s)
       : runtime_error(__s) {}
-  // TODO FMT Remove when format is no longer experimental.
-  // Avoids linker errors when building the Clang-cl Windows DLL which doesn't
-  // support the experimental library.
-#  ifndef _LIBCPP_INLINE_FORMAT_ERROR_DTOR
-  ~format_error() noexcept override;
-#  else
-  ~format_error() noexcept  override {}
-#  endif
+  ~format_error() noexcept override = default;
 };
 
 _LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void
diff --git a/libcxx/src/CMakeLists.txt b/libcxx/src/CMakeLists.txt
--- a/libcxx/src/CMakeLists.txt
+++ b/libcxx/src/CMakeLists.txt
@@ -311,7 +311,6 @@
 
 set(LIBCXX_EXPERIMENTAL_SOURCES
   experimental/memory_resource.cpp
-  format.cpp
   )
 
 add_library(cxx_experimental STATIC ${LIBCXX_EXPERIMENTAL_SOURCES})
diff --git a/libcxx/src/format.cpp b/libcxx/src/format.cpp
deleted file mode 100644
--- a/libcxx/src/format.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include <format>
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#ifndef _LIBCPP_INLINE_FORMAT_ERROR_DTOR
-format_error::~format_error() noexcept = default;
-#endif
-
-_LIBCPP_END_NAMESPACE_STD