rasti-db.gemspec in rasti-db-1.3.1 vs rasti-db.gemspec in rasti-db-1.4.0

@@ -23,10 +23,9 @@
   spec.add_runtime_dependency 'consty', '~> 1.0', '>= 1.0.3'
   spec.add_runtime_dependency 'timing', '~> 0.1', '>= 0.1.3'
   spec.add_runtime_dependency 'class_config', '~> 0.0', '>= 0.0.2'
   spec.add_runtime_dependency 'multi_require', '~> 1.0'
 
-  spec.add_development_dependency 'bundler', '~> 1.12'
   spec.add_development_dependency 'rake', '~> 11.0'
   spec.add_development_dependency 'minitest', '~> 5.0', '< 5.11'
   spec.add_development_dependency 'minitest-colorin', '~> 0.1'
   spec.add_development_dependency 'minitest-line', '~> 0.6'
   spec.add_development_dependency 'simplecov', '~> 0.12'