chore: remove mock_redis

Author: TamarinEA

redis_counters-dumpers.gemspec

@@ -28,7 +28,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rspec', '>= 3.2'
   spec.add_development_dependency 'rspec-rails', '~> 3.9.1'
   spec.add_development_dependency 'appraisal', '>= 1.0.2'
-  spec.add_development_dependency 'mock_redis'
   spec.add_development_dependency 'combustion'
   spec.add_development_dependency 'pry-byebug'
 end