SDL_image: Removed unused variable

SDL Commits
1 
From 3108f291a63f899399598ca0e4ac0c6ad06e4765 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 5 Sep 2022 12:36:14 -0700
Subject: [PATCH] Removed unused variable

---
 cmake/PrivateSdlFunctions.cmake | 1 -
 1 file changed, 1 deletion(-)

diff --git a/cmake/PrivateSdlFunctions.cmake b/cmake/PrivateSdlFunctions.cmake
index b5c63379..c5c16078 100644
--- a/cmake/PrivateSdlFunctions.cmake
+++ b/cmake/PrivateSdlFunctions.cmake
@@ -39,7 +39,6 @@ macro(sdl_calculate_derived_version_variables)
     # which are normally 0-based.
     math(EXPR DYLIB_CURRENT_VERSION_MAJOR "${LT_MAJOR} + ${LT_AGE} + 1")
     math(EXPR DYLIB_CURRENT_VERSION_MINOR "${LT_REVISION}")
-    math(EXPR DYLIB_COMPAT_VERSION_MAJOR "${LT_MAJOR} + 1")
     set(DYLIB_CURRENT_VERSION "${DYLIB_CURRENT_VERSION_MAJOR}.${DYLIB_CURRENT_VERSION_MINOR}.0")
     set(DYLIB_COMPATIBILITY_VERSION "${DYLIB_CURRENT_VERSION_MAJOR}.0.0")
 endmacro()