如何删除百度统计对资源文件的cookie

Question

网站域名是www.example.com ，静态资源JS，CSS，图片分别在js.example.com，css.example.com，img.example.com。网站安装了百度统计，发现静态资源域名也有偶百度统计的cookie，请问如何删除掉针对静态咨资源的Cookie?
在nginx服务器上我是这么设置的:
CSS：

server {
  listen 443 ssl http2;
  server_name css.example.com;
  access_log off;
  index index.html index.htm index.php;
  root /alidata1/web/css.example.com/css;
  ssl on;
  ssl_stapling on;
   ...
    location ~ .*\.(js|css)?$ {
    expires 360d;
add_header Set-Cookie "UM_distinctid=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
add_header Set-Cookie "Hm_lpvt_6188cc7a9315dbe7155a5b2c9ecceasdas03=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
add_header Set-Cookie "Hm_lvt_6188cc7a9315dbe7155a5b2c9ecceasdas03=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
    add_header Cache-Control max-age=31104000;
    access_log off;
  }

JS：

server {
  listen 443 ssl http2;
  server_name js.example.com;
  access_log off;
  index index.html index.htm index.php;
  root /alidata1/web/js.example.com/js;
  ssl on;
  ssl_stapling on;
   ...
    location ~ .*\.(js|css)?$ {
    expires 360d;
add_header Set-Cookie "UM_distinctid=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
add_header Set-Cookie "Hm_lpvt_6188cc7a9315dbe7155a5b2c9ecceasdas03=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
add_header Set-Cookie "Hm_lvt_6188cc7a9315dbe7155a5b2c9ecceasdas03=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
    add_header Cache-Control max-age=31104000;
    access_log off;
  }

img:

server {
  listen 443 ssl http2;
  server_name img.example.com;
  access_log off;
  index index.html index.htm index.php;
  root /alidata1/web/img.example.com/img;
  ssl on;
  ssl_stapling on;
   ...
   location ~ .*\.(webm|webp|gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ {
    expires 360d;
add_header Set-Cookie "UM_distinctid=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
add_header Set-Cookie "Hm_lpvt_6188cc7a9315dbe7155a5b2c9ecceasdas03=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
add_header Set-Cookie "Hm_lvt_6188cc7a9315dbe7155a5b2c9ecceasdas03=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT"; 
    add_header Cache-Control max-age=31104000;
    access_log off;
  }

发现没有效果