Revert "Update SD3 to use C++17"

This reverts commit 6ee2d21.

Author: MadMaxMangos

CMakeLists.txt

@@ -533,9 +533,6 @@ endif()
 
 add_library(mangosscript STATIC ${mangosscript_LIB_SRCS})
 
-target_compile_features(mangosscript PUBLIC cxx_std_17)
-set_target_properties(mangosscript PROPERTIES CXX_EXTENSIONS OFF)
-
 target_include_directories(mangosscript
     PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}