How to bulk remove all words (selector) marked with the word UNUSED?

Question

css

UNUSED.col-xs-1, UNUSED.col-sm-1, UNUSED.col-md-1, UNUSED.col-lg-1, UNUSED.col-xs-2, UNUSED.col-sm-2, UNUSED. col-md-2, UNUSED.col-lg-2, UNUSED.col-xs-3, UNUSED.col-sm-3, UNUSED.col-md-3, UNUSED.col-lg-3, UNUSED.col- xs-4, UNUSED.col-sm-4, UNUSED.col-md-4, UNUSED.col-lg-4, UNUSED.col-xs-5, UNUSED.col-sm-5, UNUSED.col-md- 5, UNUSED.col-lg-5, UNUSED.col-xs-6, UNUSED.col-sm-6, UNUSED.col-md-6, UNUSED.col-lg-6, UNUSED.col-xs-7, UNUSED.col-sm-7, UNUSED.col-md-7, UNUSED.col-lg-7, UNUSED.col-xs-8, UNUSED.col-sm-8, UNUSED.col-md-8, UNUSED. col-lg-8, UNUSED.col-xs-9, UNUSED.col-sm-9, UNUSED.col-md-9, UNUSED.col-lg-9, UNUSED.col-xs-10, UNUSED.col- sm-10, .col-md-10, UNUSED.col-lg-10, UNUSED.col-xs-11, UNUSED.col-sm-11, UNUSED.col-md-11, UNUSED.col-lg-11 , UNUSED.col-xs-12, .col-sm-12, UNUSED.col-md-12, UNUSED.col-lg-12 {
position: relative;
min-height: 1px
padding-left: 15px;
padding-right:
15px

Answer 1

Search and replace using regular expression:
UNUSED[\.]col-[\w]{2}-[0-9]{1,2}