SDL: cmake: LINKER_LANGUAGE is a target property, not a cmake variable

SDL Commits
1 
From a787b1c0b7dfe2d21564d9c93eb6e1dd73cfb780 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Mon, 22 Aug 2022 02:45:55 +0200
Subject: [PATCH] cmake: LINKER_LANGUAGE is a target property, not a cmake
 variable

LINKER_LANGUAGE needs to be used as following:
Usage

  cmake [options] <path-to-source>
  cmake [options] <path-to-existing-build>
  cmake [options] -S <path-to-source> -B <path-to-build>

Specify a source directory to (re-)generate a build system for it in the
current working directory.  Specify an existing build directory to
re-generate its build system.

Run 'cmake --help' for more information.

Haiku does not not this property explicitly set because CMake knows .cc files are c++
---
 CMakeLists.txt | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c7107a3ea6a9..6cfa064f1a10 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,10 +11,6 @@ else()
   set(SDL3_SUBPROJECT ON)
 endif()
 
-if (HAIKU)
-  set(LINKER_LANGUAGE CXX)
-endif()
-
 set(EXTRA_LIBS)
 set(EXTRA_LDFLAGS)