Purls in database but no files exist

[jcoyne]

In prod:

druid:sb871kt0606
druid:sb857zn0490
druid:xk799kx1061
No document directory for: druid:gt837gg3866
No document directory for: druid:sc248jq5623
No document directory for: druid:sc255yw4697
No document directory for: druid:sc179hd9845
No document directory for: druid:cd346td9216
No document directory for: druid:cd147qh9115
800000
No document directory for: druid:by535vh3862
900000
No document directory for: druid:kf500mk9319
No document directory for: druid:jb840yd7242
No document directory for: druid:xc182jm9921
No document directory for: druid:tc563ff3389
No document directory for: druid:fx713gk5087
No document directory for: druid:rg901jz6147
No document directory for: druid:wx979bm6544
1000000
1100000
No document directory for: druid:gg014vs7551
1200000
No document directory for: druid:hw495hg6924
1300000
1400000
No document directory for: druid:cw722py1800
No document directory for: druid:dj978dj4736
No document directory for: druid:gr517ct4413
No document directory for: druid:kj574fv0490
No document directory for: druid:pv742cc6646
No document directory for: druid:tb274jx4519
No document directory for: druid:yy615sh2620
1500000
1600000
1700000
No document directory for: druid:fg404zx7125
No document directory for: druid:hv330rf9699
No document directory for: druid:xd831sr6120
No document directory for: druid:yf844tn4838
1800000
1900000
2000000
No document directory for: druid:yc569nz0183
2100000
No document directory for: druid:rz599vn6520
2300000
2400000
No document directory for: druid:vz960gb5852
2500000
2600000
No document directory for: druid:dq478yr0199
2700000
2800000

These seem very old, and may have been removed as duplicates.

3.3.0 :001 > Purl.find_by(druid: 'druid:sb871kt0606')
 =>
#<Purl:0x00007f8c170fe100
 id: 73413,
 druid: "druid:sb871kt0606",
 object_type: "item",
 deleted_at: nil,
 created_at: Wed, 24 Aug 2016 06:36:44.000000000 UTC +00:00,
 updated_at: Wed, 24 Aug 2016 06:36:44.000000000 UTC +00:00,
 published_at: Tue, 19 Mar 2013 05:37:57.000000000 UTC +00:00,
 title: "The  Democracy of France: [estampe]",
 catkey: "">
 
 3.3.0 :002 > Purl.find_by(druid: 'druid:sb857zn0490')
 =>
#<Purl:0x00007f8c2c882d08
 id: 73562,
 druid: "druid:sb857zn0490",
 object_type: "item",
 deleted_at: nil,
 created_at: Wed, 24 Aug 2016 06:36:55.000000000 UTC +00:00,
 updated_at: Wed, 24 Aug 2016 06:36:55.000000000 UTC +00:00,
 published_at: Tue, 19 Mar 2013 05:37:48.000000000 UTC +00:00,
 title: "Reprise de la ville de Toulon par les armées de la République contre les Anglais et les Espagnols: [estampe]",
 catkey: "">