大佬们，这个警告怎么解决啊。

我的设置是
\documentclass{svproc}
%
% RECOMMENDED %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% table
\usepackage{makecell}
\usepackage{amsmath}
\usepackage{multirow}
\usepackage{float}
% to typeset URLs, URIs, and DOIs
\usepackage{url}
\def\UrlFont{\rmfamily}
%figure
\usepackage{subcaption}
\usepackage{graphicx}
\usepackage{marvosym}
\usepackage{ifsym}
\usepackage{picins}
一直警报不知道会不会影响提交。大佬们求救