Fix Lint/RedundantCopDisableDirective offenses

As we want to enable this cop after fixing all the offenses.

lib/gitlab/database/migrations/observation.rb

-# rubocop:disable Naming/FileName
 # frozen_string_literal: true
 
 module Gitlab
@@ -13,5 +12,3 @@ def to_json(...)
     end
   end
 end
-
-# rubocop:enable Naming/FileName

lib/gitlab/database/migrations/observers/query_log.rb

@@ -6,7 +6,7 @@ module Migrations
       module Observers
         class QueryLog < MigrationObserver
           def before
-            @logger_was = ActiveRecord::Base.logger # rubocop:disable Database/MultipleDatabases
+            @logger_was = ActiveRecord::Base.logger
             file_path = File.join(output_dir, "migration.log")
             @logger = Logger.new(file_path)
             ActiveRecord::Base.logger = @logger

lib/gitlab/database/migrations/runner_backoff/migration_helpers.rb

@@ -9,7 +9,7 @@ module MigrationHelpers
 
           class_methods do
             def enable_runner_backoff!
-              @enable_runner_backoff = true # rubocop:disable Gitlab/ModuleWithInstanceVariables
+              @enable_runner_backoff = true
             end
 
             def enable_runner_backoff?

lib/gitlab/database/migrations/squasher.rb

 # frozen_string_literal: true
 
-require 'set' # rubocop:disable Lint/RedundantRequireStatement -- Ruby 3.1 and earlier needs this. Drop this line after Ruby 3.2+ is only supported.
+require 'set' # -- Ruby 3.1 and earlier needs this. Drop this line after Ruby 3.2+ is only supported.
 
 module Gitlab
   module Database

spec/lib/gitlab/background_migration/backfill_finding_id_in_vulnerabilities_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-RSpec.describe Gitlab::BackgroundMigration::BackfillFindingIdInVulnerabilities, schema: 20230912105945, feature_category: :vulnerability_management do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::BackfillFindingIdInVulnerabilities, schema: 20230912105945, feature_category: :vulnerability_management do
   let(:namespaces) { table(:namespaces) }
   let(:projects) { table(:projects) }
   let(:users) { table(:users) }

spec/lib/gitlab/background_migration/backfill_missing_ci_cd_settings_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::BackfillMissingCiCdSettings, schema: 20230721095222, feature_category: :source_code_management do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::BackfillMissingCiCdSettings, schema: 20230721095222, feature_category: :source_code_management do
   let(:projects_table) { table(:projects) }
   let(:namespaces_table) { table(:namespaces) }
   let(:ci_cd_settings_table) { table(:project_ci_cd_settings) }

spec/lib/gitlab/background_migration/backfill_root_storage_statistics_fork_storage_sizes_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::BackfillRootStorageStatisticsForkStorageSizes, schema: 20230721095222, feature_category: :consumables_cost_management do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::BackfillRootStorageStatisticsForkStorageSizes, schema: 20230721095222, feature_category: :consumables_cost_management do
   describe '#perform' do
     let(:namespaces_table) { table(:namespaces) }
     let(:root_storage_statistics_table) { table(:namespace_root_storage_statistics) }

spec/lib/gitlab/background_migration/backfill_uuid_conversion_column_in_vulnerability_occurrences_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::BackfillUuidConversionColumnInVulnerabilityOccurrences, schema: 20230721095222, feature_category: :vulnerability_management do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::BackfillUuidConversionColumnInVulnerabilityOccurrences, schema: 20230721095222, feature_category: :vulnerability_management do
   let(:namespaces) { table(:namespaces) }
   let(:projects) { table(:projects) }
   let(:users) { table(:users) }

spec/lib/gitlab/background_migration/backfill_vulnerability_reads_cluster_agent_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::BackfillVulnerabilityReadsClusterAgent, :migration, schema: 20230721095222 do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::BackfillVulnerabilityReadsClusterAgent, :migration, schema: 20230721095222 do
   let(:migration) do
     described_class.new(
       start_id: 1, end_id: 10,

spec/lib/gitlab/background_migration/batching_strategies/backfill_project_statistics_with_container_registry_size_batching_strategy_spec.rb

@@ -2,6 +2,6 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::BatchingStrategies::BackfillProjectStatisticsWithContainerRegistrySizeBatchingStrategy do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::BatchingStrategies::BackfillProjectStatisticsWithContainerRegistrySizeBatchingStrategy do
   it { expect(described_class).to be < Gitlab::BackgroundMigration::BatchingStrategies::PrimaryKeyBatchingStrategy }
 end

spec/lib/gitlab/background_migration/convert_credit_card_validation_data_to_hashes_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::ConvertCreditCardValidationDataToHashes, schema: 20230721095222, feature_category: :user_profile do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::ConvertCreditCardValidationDataToHashes, schema: 20230721095222, feature_category: :user_profile do
   let(:users_table) { table(:users) }
   let(:credit_card_validations_table) { table(:user_credit_card_validations) }
   let(:rows) { 5 }

spec/lib/gitlab/background_migration/drop_vulnerabilities_without_finding_id_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::DropVulnerabilitiesWithoutFindingId, feature_category: :vulnerability_management do # rubocop:disable Layout/LineLength -- autogenerated
+RSpec.describe Gitlab::BackgroundMigration::DropVulnerabilitiesWithoutFindingId, feature_category: :vulnerability_management do
   let(:namespaces) { table(:namespaces) }
   let(:projects) { table(:projects) }
   let(:users) { table(:users) }

spec/lib/gitlab/background_migration/populate_vulnerability_dismissal_fields_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::BackgroundMigration::PopulateVulnerabilityDismissalFields, schema: 20230721095222, feature_category: :vulnerability_management do # rubocop:disable Layout/LineLength
+RSpec.describe Gitlab::BackgroundMigration::PopulateVulnerabilityDismissalFields, schema: 20230721095222, feature_category: :vulnerability_management do
   let(:users) { table(:users) }
   let(:namespaces) { table(:namespaces) }
   let(:projects) { table(:projects) }

spec/lib/gitlab/background_migration/resolve_vulnerabilities_for_removed_analyzers_spec.rb

@@ -55,7 +55,7 @@
     ]
   end
 
-  shared_context 'with vulnerability data' do # rubocop:disable RSpec/MultipleMemoizedHelpers -- we need to satifsy foreign keys
+  shared_context 'with vulnerability data' do
     let!(:vulnerabilities_to_resolve) do
       removed_scanners.map do |external_id|
         create_vulnerability(project_id: project.id, external_id: external_id)