fix

Author: esigo

ci/do_ci.sh

@@ -216,7 +216,6 @@ elif [[ "$1" == "cmake.c++20.test" ]]; then
         -DWITH_ASYNC_EXPORT_PREVIEW=ON \
         -DCMAKE_CXX_STANDARD=20 \
         ${IWYU} \
-        -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="iwyu" \
         "${SRC_DIR}"
   eval "$MAKE_COMMAND"
   make test