data.database/migrations: remove repo_id from db

This also manually organizes and removes broken parts of the migration.

data/database.py

@@ -549,17 +549,12 @@ class Visibility(BaseModel):
   name = CharField(index=True, unique=True)
 
 
-class RepositoryKind(BaseModel):
-  name = CharField(index=True, unique=True)
-
-
 class Repository(BaseModel):
   namespace_user = QuayUserField(null=True)
   name = FullIndexedCharField(match_function=db_match_func)
   visibility = ForeignKeyField(Visibility)
   description = FullIndexedTextField(match_function=db_match_func, null=True)
   badge_token = CharField(default=uuid_generator)
-  repo_kind = EnumField(RepositoryKind)
 
   class Meta:
     database = db