Summary:
If multi selection have 0 column and delete the selection, 0 + 1 column also
deleted
This fix that bug.
Also, remove needless code.
Test Plan:
1. select multi line with 0 column.
2. delete the selection
Reviewers: ajwillia.ms
Reviewed By: ajwillia.ms
Subscribers: cedric, jpeg
Differential Revision: https://phab.enlightenment.org/D4922