Remove type cast as mxe(mingw32) compiler complains about useless-cast
when FMT_PEDANTIC && FMT_WERROR options are enabled
"""
error: useless cast to type 'class fmt::v10::basic_format_args<fmt::v10::basic_format_context<fmt::v10::appender, char> >' [-Werror=useless-cast]
1449 | basic_format_args<buffer_context<char>>(args));
"""