Don't override the MacPorts setting for CMAKE_OSX_ARCHITECTURES.

https://codeberg.org/tenacityteam/tenacity/issues/396
--- CMakeLists.txt.orig	2023-11-12 21:06:32.000000000 -0600
+++ CMakeLists.txt	2024-03-08 02:40:51.000000000 -0600
@@ -147,11 +147,6 @@
    set( CMAKE_XCODE_GENERATE_SCHEME ON )
 
    # Define the OSX compatibility parameters
-   if (CMAKE_APPLE_SILICON_PROCESSOR MATCHES "arm64")
-      set( CMAKE_OSX_ARCHITECTURES arm64 CACHE INTERNAL "" )
-   else()
-      set( CMAKE_OSX_ARCHIECTURES x86_64 CACHE INTERNAL "" )
-   endif()
    set( CMAKE_OSX_DEPLOYMENT_TARGET ${MIN_MACOS_VERSION} CACHE INTERNAL "" )
    set( CMAKE_OSX_SYSROOT macosx CACHE INTERNAL "" )
    set( CMAKE_XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "" CACHE INTERNAL "" )