Remove ignored circuit_breaker columns

The circuit breaker itself got removed a while ago, when that happened
some parts got left behind. Using grep old stale settings and
validations were found and are now removed.

app/models/application_setting.rb

@@ -23,11 +23,6 @@ class ApplicationSetting < ApplicationRecord
   serialize :domain_blacklist, Array # rubocop:disable Cop/ActiveRecordSerialize
   serialize :repository_storages # rubocop:disable Cop/ActiveRecordSerialize
 
-  ignore_column :circuitbreaker_failure_count_threshold
-  ignore_column :circuitbreaker_failure_reset_time
-  ignore_column :circuitbreaker_storage_timeout
-  ignore_column :circuitbreaker_access_retries
-  ignore_column :circuitbreaker_check_interval
   ignore_column :koding_url
   ignore_column :koding_enabled
   ignore_column :sentry_enabled

config/initializers/6_validations.rb

-def storage_name_valid?(name)
-  !!(name =~ /\A[a-zA-Z0-9\-_]+\z/)
-end
-
 def storage_validation_error(message)
   raise "#{message}. Please fix this in your gitlab.yml before starting GitLab."
 end
 
 def validate_storages_config
-  storage_validation_error('No repository storage path defined') if Gitlab.config.repositories.storages.empty?
-
-  Gitlab.config.repositories.storages.each do |name, repository_storage|
-    storage_validation_error("\"#{name}\" is not a valid storage name") unless storage_name_valid?(name)
-
-    %w(failure_count_threshold failure_reset_time storage_timeout).each do |setting|
-      # Falling back to the defaults is fine!
-      next if repository_storage[setting].nil?
+  if Gitlab.config.repositories.storages.empty?
+    storage_validation_error('No repository storage path defined')
+  end
 
-      unless repository_storage[setting].to_f > 0
-        storage_validation_error("`#{setting}` for storage `#{name}` needs to be greater than 0")
-      end
+  Gitlab.config.repositories.storages.keys.each do |name|
+    unless /\A[a-zA-Z0-9\-_]+\z/.match?(name)
+      storage_validation_error("\"#{name}\" is not a valid storage name")
     end
   end
 end

spec/initializers/6_validations_spec.rb

@@ -2,16 +2,6 @@ require 'spec_helper'
 require_relative '../../config/initializers/6_validations.rb'
 
 describe '6_validations' do
-  before :all do
-    FileUtils.mkdir_p('tmp/tests/paths/a/b/c/d')
-    FileUtils.mkdir_p('tmp/tests/paths/a/b/c2')
-    FileUtils.mkdir_p('tmp/tests/paths/a/b/d')
-  end
-
-  after :all do
-    FileUtils.rm_rf('tmp/tests/paths')
-  end
-
   describe 'validate_storages_config' do
     context 'with correct settings' do
       before do
@@ -23,16 +13,6 @@ describe '6_validations' do
       end
     end
 
-    context 'when one of the settings is incorrect' do
-      before do
-        mock_storages('foo' => Gitlab::GitalyClient::StorageSettings.new('path' => 'tmp/tests/paths/a/b/c', 'failure_count_threshold' => 'not a number'))
-      end
-
-      it 'throws an error' do
-        expect { validate_storages_config }.to raise_error(/failure_count_threshold/)
-      end
-    end
-
     context 'with invalid storage names' do
       before do
         mock_storages('name with spaces' => Gitlab::GitalyClient::StorageSettings.new('path' => 'tmp/tests/paths/a/b/c'))