[llvm] [ADT] Remove ArrayRef(std::nullopt_t) (PR #165831)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/165831

ArrayRef(std::nullopt_t) has been deprecated since:

  commit 2529de5c935ad59e5f76d15890f857bf42817bc9
  Author: Kazu Hirata <kazu at google.com>
  Date:   Fri Jun 27 01:03:02 2025 -0700

Note that we've made at lease one release, llvmorg-21.1, with this
deprecation.


>From c939b48e98948f3ca3c66b9ad7f15600507df9c6 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Thu, 30 Oct 2025 12:37:34 -0700
Subject: [PATCH] [ADT] Remove ArrayRef(std::nullopt_t)

ArrayRef(std::nullopt_t) has been deprecated since:

  commit 2529de5c935ad59e5f76d15890f857bf42817bc9
  Author: Kazu Hirata <kazu at google.com>
  Date:   Fri Jun 27 01:03:02 2025 -0700

Note that we've made at lease one release, llvmorg-21.1, with this
deprecation.
---
 llvm/include/llvm/ADT/ArrayRef.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/llvm/include/llvm/ADT/ArrayRef.h b/llvm/include/llvm/ADT/ArrayRef.h
index 448d10013d371..450f4d04c97fc 100644
--- a/llvm/include/llvm/ADT/ArrayRef.h
+++ b/llvm/include/llvm/ADT/ArrayRef.h
@@ -66,10 +66,6 @@ namespace llvm {
     /// Construct an empty ArrayRef.
     /*implicit*/ ArrayRef() = default;
 
-    /// Construct an empty ArrayRef from std::nullopt.
-    /*implicit*/ LLVM_DEPRECATED("Use {} or ArrayRef<T>() instead", "{}")
-    ArrayRef(std::nullopt_t) {}
-
     /// Construct an ArrayRef from a single element.
     /*implicit*/ ArrayRef(const T &OneElt LLVM_LIFETIME_BOUND)
         : Data(&OneElt), Length(1) {}