Deleting valid features that currently exist on the ground goes against OSM Good Practice (at best) and is reportable Abuse (at worst). I sympathize that having separately-drawn sidewalk ways and sidewalk tags on the same street feels redundant but that's not an acceptable reason to delete.

I advise reverting this changeset as well as the following changesets which improperly delete sidewalks, crossings, or other features.

https://www.openstreetmap.org/changeset/173565067

https://www.openstreetmap.org/changeset/173564917

https://www.openstreetmap.org/changeset/173565257

Adding valid information is always welcome; deleting valid features is not.