I went to through many postings of WordPress Forum to remove /blog/ from my Website
i did everything from the Forum, but some how /blog/ came back after updating in Network admin and sites Permalinks
even i went to phpmyadmin to delete this troublesome /blog/
as original site was built without /blog/ but when i migrated to new host i used latest wordpress and imported data from old site;
and in Google or other search engines it was listed without /blog/
at last i went to
$blog_prefix = ‘/blog’;
and updated with
$blog_prefix = ”;
thats indian version of EUREKA….! (My wife doubts when i shout Surekha coz its a Indian Girl name)
WORDPRESS experts may laugh at me, but i found hardway to solve the Problem.
Hope its works for you too.