Authorship when contribution is removed
Yes, I would say that he/she should still be included as an author. Despite this person's sections being eliminated, it is likely that they contributed intellectually in other ways throughout the project, through discussions, meetings, paper revisions, etc. Even in the rare occasion that this is not the case (individual responsible for that one analysis only), it is not his/her fault the contribution was removed, and one should respect the time spent.