Merge pull request #7055 from hughbe/unreachable

Cleanup swift_unreachable

include/swift/Basic/Unreachable.h

@@ -1,32 +0,0 @@
-//===--- Unreachable.h - Implements swift_unreachable -----------*- C++ -*-===//
-//
-// This source file is part of the Swift.org open source project
-//
-// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
-// Licensed under Apache License v2.0 with Runtime Library Exception
-//
-// See https://swift.org/LICENSE.txt for license information
-// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-//
-//===----------------------------------------------------------------------===//
-//
-//  This file defines swift_unreachable, an LLVM-independent implementation of
-//  llvm_unreachable.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef SWIFT_BASIC_UNREACHABLE_H
-#define SWIFT_BASIC_UNREACHABLE_H
-
-#include "llvm/Support/Compiler.h"
-#include <assert.h>
-#include <stdlib.h>
-
-LLVM_ATTRIBUTE_NORETURN
-inline static void swift_unreachable(const char* msg) {
-  assert(false && msg);
-  (void)msg;
-  abort();
-}
-
-#endif // SWIFT_BASIC_UNREACHABLE_H