Remove DerivedImageStorage table

data/database.py

@@ -514,20 +514,6 @@ class ImageStorageSignature(BaseModel):
     )
 
 
-# NOTE: This table is *deprecated* and will be removed in the next PR.
-class DerivedImageStorage(BaseModel):
-  source = ForeignKeyField(ImageStorage, null=True, related_name='source')
-  derivative = ForeignKeyField(ImageStorage, related_name='derivative')
-  transformation = ForeignKeyField(ImageStorageTransformation)
-
-  class Meta:
-    database = db
-    read_slaves = (read_slave,)
-    indexes = (
-      (('source', 'transformation'), True),
-    )
-
-
 class ImageStorageLocation(BaseModel):
   name = CharField(unique=True, index=True)
 
@@ -842,7 +828,7 @@ all_models = [User, Repository, Image, AccessToken, Role, RepositoryPermission,
               OAuthApplication, OAuthAuthorizationCode, OAuthAccessToken, NotificationKind,
               Notification, ImageStorageLocation, ImageStoragePlacement,
               ExternalNotificationEvent, ExternalNotificationMethod, RepositoryNotification,
-              RepositoryAuthorizedEmail, ImageStorageTransformation, DerivedImageStorage,
+              RepositoryAuthorizedEmail, ImageStorageTransformation,
               TeamMemberInvite, ImageStorageSignature, ImageStorageSignatureKind,
               AccessTokenKind, Star, RepositoryActionCount, TagManifest, UserRegion,
               QuayService, QuayRegion, QuayRelease, BlobUpload, DerivedStorageForImage]