Delete Version Spec

I suppose this is what I get for pushing to master for just a small
change. However this spec doesn't test anything, and only exists to be
forgotten when someone is ticking a version.

Tick to 3.0.1

Update CHANGES.md before release v3.0.0

v2.2.0 Release

rspec-sidekiq v2.1.0 Release

rspec-sidekiq v2.0.0 Release

v2.0.0.beta Release

Updates Travis rbx entry to rbx-2

Adds final changes for 1.0.0 release into CHANGES.md

Prepare for 0.5.1 release