arm: remove LuaJIT EXTERNAL_UNWIND on x86/64

cmake/luajit.cmake

@@ -145,10 +145,6 @@ macro(luajit_build)
         separate_arguments(luajit_cflags)
     set (luajut_ldflags ${CMAKE_STATIC_LINKER_FLAGS})
         separate_arguments(luajit_ldflags)
-    if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "86|amd64")
-        # Use external unwind on x86
-        set (luajit_xcflags "-DLUAJIT_UNWIND_EXTERNAL=1")
-    endif()
     # We are consciously ommiting debug info in RelWithDebugInfo mode
     if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
         set (luajit_ccopt -O0)