[llvm] [CMake] Do not set CMP0116 explicitly to old (PR #90385)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 updated https://github.com/llvm/llvm-project/pull/90385

>From 82e78838850c5fe6219979395d1e30fa66a6bb54 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Sun, 28 Apr 2024 08:34:53 +0000
Subject: [PATCH] [CMake] Do not set CMP0116 explicitly to old

CMP0116 was originally set to old to get rid of warnings. However, this
behavior is now set to new by default with the minimum CMake version that LLVM
requires so does not produce any warnings, and setting it explicitly to old
does produce a warning in newer CMake versions. Due to these reasons, remove
this check for now.

Splitting off from removing the CMP0114 check just in case something breaks.

This also removes two instances of a workaround related to the old
behavior of CMP0116.

Partially fixes #83727.
---
 cmake/Modules/CMakePolicy.cmake | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/cmake/Modules/CMakePolicy.cmake b/cmake/Modules/CMakePolicy.cmake
index f19dfd71657171..f6ecc40d8f1279 100644
--- a/cmake/Modules/CMakePolicy.cmake
+++ b/cmake/Modules/CMakePolicy.cmake
@@ -1,11 +1,5 @@
 # CMake policy settings shared between LLVM projects
 
-# CMP0116: Ninja generators transform `DEPFILE`s from `add_custom_command()`
-# New in CMake 3.20. https://cmake.org/cmake/help/latest/policy/CMP0116.html
-if(POLICY CMP0116)
-  cmake_policy(SET CMP0116 OLD)
-endif()
-
 # MSVC debug information format flags are selected via
 # CMAKE_MSVC_DEBUG_INFORMATION_FORMAT, instead of
 # embedding flags in e.g. CMAKE_CXX_FLAGS_RELEASE.