Remove feature flag for usage ping batch counter

- Was default on (true) on all environments
- Was well tested past 3 months not to cause any problems

ee/spec/lib/ee/gitlab/usage_data_spec.rb

@@ -283,12 +283,6 @@ RSpec.describe Gitlab::UsageData do
     end
   end
 
-  [true, false].each do |usage_ping_batch_counter_on|
-    describe "when the feature flag usage_ping_batch_counter is set to #{usage_ping_batch_counter_on}" do
-      before do
-        stub_feature_flags(usage_ping_batch_counter: usage_ping_batch_counter_on)
-      end
-
   describe '.uncached_data' do
     describe '.usage_activity_by_stage' do
       it 'includes usage_activity_by_stage data' do
@@ -722,8 +716,6 @@ RSpec.describe Gitlab::UsageData do
       end
     end
   end
-    end
-  end
 
   describe '.recording_ee_finished_at' do
     subject { described_class.recording_ee_finish_data }

lib/gitlab/utils/usage_data.rb

@@ -40,7 +40,7 @@ module Gitlab
       FALLBACK = -1
 
       def count(relation, column = nil, batch: true, start: nil, finish: nil)
-        if batch && Feature.enabled?(:usage_ping_batch_counter, default_enabled: true)
+        if batch
           Gitlab::Database::BatchCount.batch_count(relation, column, start: start, finish: finish)
         else
           relation.count
@@ -50,7 +50,7 @@ module Gitlab
       end
 
       def distinct_count(relation, column = nil, batch: true, batch_size: nil, start: nil, finish: nil)
-        if batch && Feature.enabled?(:usage_ping_batch_counter, default_enabled: true)
+        if batch
           Gitlab::Database::BatchCount.batch_distinct_count(relation, column, batch_size: batch_size, start: start, finish: finish)
         else
           relation.distinct_count_by(column)

spec/lib/gitlab/usage_data_spec.rb

@@ -10,7 +10,6 @@ describe Gitlab::UsageData, :aggregate_failures do
     stub_object_store_settings
   end
 
-  shared_examples "usage data execution" do
   describe '#data' do
     let!(:ud) { build(:usage_data) }
 
@@ -644,23 +643,6 @@ describe Gitlab::UsageData, :aggregate_failures do
       end
     end
   end
-  end
-
-  context 'when usage usage_ping_batch_counter is true' do
-    before do
-      stub_feature_flags(usage_ping_batch_counter: true)
-    end
-
-    it_behaves_like 'usage data execution'
-  end
-
-  context 'when usage usage_ping_batch_counter is false' do
-    before do
-      stub_feature_flags(usage_ping_batch_counter: false)
-    end
-
-    it_behaves_like 'usage data execution'
-  end
 
   describe '#merge_requests_usage_data' do
     let(:time_period) { { created_at: 2.days.ago..Time.current } }