Sublime Text: Find and remove all duplicates

Question

I have a file with the following:

a
b
b
c

And I need to find all duplicates and remove them, so it should be like this:

a
c

The command "edit > permute lines > unique" wouldn't delete all the occurrences. Any suggestions? Thank you!

Answer 1

Try: "edit -> sort lines" then "edit -> permute lines -> unique"

Answer 2

Select some text and press Ctrl + D to add more instances. Then press delete to remove. Read more feature at Sublime text doc