optimize imports does not remove deleted lines...

I had a file like this: line numbers in the ()

(1) package a.b.c.d;
(2)
(3) import java.io.IOException;
(4)
...

When I optimized the imports that removed line (3) I got

(1) package a.b.c.d;
(2)
(3)
(4)
...

Not something I terribly care about, but something I noticed in 1120, may be it has been this way all the while, I just did not notice it.