Remove non-committal language about backup-list
Remove non-committal language about backup-list

It hasn't changed in years, less so than other un-itemized parts of
WAL-E.  This hedging has transgressed to bloat.

RichardKnop/wal-e,tenstartups/wal-e,DataDog/wal-e,equa/wal-e,wal-e/wal-e,ajmarks/wal-e,fdr/wal-e,x86Labs/wal-e,heroku/wal-e,nagual13/wal-e,intoximeters/wal-e,ArtemZ/wal-e,modulexcite/wal-e