Remove extra DB queue layer for removing events (fixes #181)
Remove extra DB queue layer for removing events (fixes #181)

snowplow/snowplow-objc-tracker,snowplow/snowplow-objc-tracker,iamjason/snowplow-objc-tracker,redengineer/snowplow-objc-tracker,snowplow/snowplow-objc-tracker,iamjason/snowplow-objc-tracker,redengineer/snowplow-objc-tracker,chunkyguy/snowplow-objc-tracker,chunkyguy/snowplow-objc-tracker,iamjason/snowplow-objc-tracker,snowplow/snowplow-objc-tracker