As we do not have the automated way to delete more than one segments, we can use the below steps to delete more than one segment at a time by adjusting the maximum size of the translation list option in the maintenance tool

SDL Maintain allows to change view to 1,000 items per page, you can select all 1,000 and delete them in one go.
Go to TM Maintenance Tool -> Tools -> Options




To select all 1,000 lines, click on the first one, scroll down and with holding shift, click on the last one.
Hit CTRL+R and then CTRL+S, it will prompt you if you want to remove all selected lines.