If you have problem with remove multiple LinekedIn connections at once, this code may help you.
In this code there is a filter that checks conection's occupation and based on that it will remove some connections.
Use some keyword to filter your connections and remove some.
In order to use this script open your connections page at linkedin.com quick open, then go to page inspect view and in the console paste the code below press Enter and wait till finishes it's job.