public List<RegionInfo> getRegionsToRemove() {
      return this.regionsToRemove;
    }
Returns the list of regions removed during the on-disk restore. The caller is responsible to
remove the regions from META. e.g. MetaTableAccessor.deleteRegions(...)
@return the list of regions to remove from META
hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.java