Why? Unless the pedestrian walkways inside the shopping centre no longer exist, there is no reason to delete them.

They could probably be tagged better than as highway=pedestrian, e.g. as highway=corridor

I have reverted your changeset and changed the tagging in
https://www.openstreetmap.org/changeset/155993714
and
https://www.openstreetmap.org/changeset/155993753
