Remove duration_chart endpoint

This change removes the VSA duration_chart endpoint.

ee/app/controllers/groups/analytics/cycle_analytics/stages_controller.rb

@@ -9,8 +9,8 @@ module Groups
 
         before_action :load_group
         before_action :load_value_stream
-        before_action :validate_params, only: %i[median average records duration_chart average_duration_chart count]
-        before_action :authorize_read_group_stage, only: %i[median average records duration_chart average_duration_chart count]
+        before_action :validate_params, only: %i[median average records average_duration_chart count]
+        before_action :authorize_read_group_stage, only: %i[median average records average_duration_chart count]
 
         def index
           return render_403 unless can?(current_user, :read_group_cycle_analytics, @group)
@@ -58,10 +58,6 @@ module Groups
           render json: serialized_records
         end
 
-        def duration_chart
-          render json: ::Analytics::CycleAnalytics::DurationChartItemEntity.represent(data_collector.duration_chart_data)
-        end
-
         def average_duration_chart
           render json: ::Analytics::CycleAnalytics::DurationChartAverageItemEntity.represent(data_collector.duration_chart_average_data)
         end

ee/config/routes/group.rb

@@ -28,7 +28,6 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
         resources :stages, only: [:index, :create, :update, :destroy] do
           member do
             get :average_duration_chart
-            get :duration_chart
             get :median
             get :average
             get :records
@@ -39,7 +38,6 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
           resources :stages, only: [:index, :create, :update, :destroy] do
             member do
               get :average_duration_chart
-              get :duration_chart
               get :median
               get :average
               get :records

ee/lib/ee/gitlab/analytics/cycle_analytics/data_collector.rb

@@ -5,13 +5,6 @@ module EE
     module Analytics
       module CycleAnalytics
         module DataCollector
-          # Deprecated, will be removed in the next milestone: https://gitlab.com/gitlab-org/gitlab/-/issues/328219
-          def duration_chart_data
-            strong_memoize(:duration_chart) do
-              duration_chart.load
-            end
-          end
-
           def duration_chart_average_data
             strong_memoize(:duration_chart_average_data) do
               duration_chart.average_by_day

ee/lib/gitlab/analytics/cycle_analytics/data_for_duration_chart.rb

@@ -14,14 +14,6 @@ module Gitlab
           @query = query
         end
 
-        # rubocop: disable CodeReuse/ActiveRecord
-        def load
-          order_by(query, :end_event, :desc)
-            .select(round_duration_to_seconds.as('duration_in_seconds'), stage.end_event.timestamp_projection.as('finished_at'))
-            .limit(MAX_RESULTS)
-        end
-        # rubocop: enable CodeReuse/ActiveRecord
-
         # rubocop: disable CodeReuse/ActiveRecord
         def average_by_day
           date = Arel::Nodes::NamedFunction.new('DATE', [stage.end_event.timestamp_projection])

ee/spec/fixtures/api/schemas/analytics/cycle_analytics/duration_chart.json

-{
-  "type": "array",
-  "items": {
-    "type": "object",
-    "required": ["duration_in_seconds", "finished_at"],
-    "properties": {
-      "duration_in_seconds": {
-        "type": "integer"
-      },
-      "finished_at": {
-        "type": "string"
-      }
-    },
-    "additionalProperties": false
-  }
-}

ee/spec/lib/gitlab/analytics/cycle_analytics/data_collector_spec.rb

@@ -104,16 +104,6 @@ RSpec.describe Gitlab::Analytics::CycleAnalytics::DataCollector do
       expect(round_to_days(data_collector.median.seconds)).to eq(10)
     end
 
-    describe '#duration_chart_data' do
-      subject { data_collector.duration_chart_data }
-
-      it 'loads data ordered by event time' do
-        days = subject.map { |item| round_to_days(item.duration_in_seconds) }
-
-        expect(days).to eq([15, 10, 5])
-      end
-    end
-
     describe '#duration_chart_average_data' do
       subject { data_collector.duration_chart_average_data }
 

ee/spec/support/shared_examples/controllers/analytics/cycle_analytics/shared_stage_shared_examples.rb

@@ -251,23 +251,7 @@ RSpec.shared_examples 'Value Stream Analytics Stages controller' do
       end
     end
 
-    describe 'GET #duration_chart' do
-      subject { get :duration_chart, params: params }
-
-      it 'matches the response schema' do
-        fake_result = [double(MergeRequest, duration_in_seconds: 10, finished_at: Time.current)]
-        expect_any_instance_of(Gitlab::Analytics::CycleAnalytics::DataForDurationChart).to receive(:load).and_return(fake_result)
-
-        subject
-
-        expect(response).to match_response_schema('analytics/cycle_analytics/duration_chart', dir: 'ee')
-      end
-
-      include_examples 'Value Stream Analytics data endpoint examples'
-      include_examples 'group permission check on the controller level'
-    end
-
-    describe 'GET #duration_chart' do
+    describe 'GET #average_duration_chart' do
       subject { get :average_duration_chart, params: params }
 
       it 'matches the response schema' do