Eliminate no_stats in value stream analytics

Eliminate unnecessary no data check in project level value
stream analytics.

app/controllers/projects/cycle_analytics_controller.rb

@@ -17,8 +17,6 @@ class Projects::CycleAnalyticsController < Projects::ApplicationController
   def show
     @cycle_analytics = ::CycleAnalytics::ProjectLevel.new(@project, options: options(cycle_analytics_project_params))
 
-    @cycle_analytics_no_data = @cycle_analytics.no_stats?
-
     respond_to do |format|
       format.html do
         Gitlab::UsageDataCounters::CycleAnalyticsCounter.count(:views)

app/models/cycle_analytics/level_base.rb

@@ -59,10 +59,6 @@ module CycleAnalytics
       end
     end
 
-    def no_stats?
-      stats.all? { |hash| hash[:value].nil? }
-    end
-
     def [](stage_name)
       if Feature.enabled?(:new_project_level_vsa_backend, resource_parent)
         StageAdapter.new(build_stage(stage_name), options)

app/views/projects/cycle_analytics/show.html.haml

@@ -2,13 +2,6 @@
 - add_page_specific_style 'page_bundles/cycle_analytics'
 
 #cycle-analytics{ "v-cloak" => "true", data: { request_path: project_cycle_analytics_path(@project) } }
-  - if @cycle_analytics_no_data
-    %banner{ "v-if" => "!isOverviewDialogDismissed",
-      "documentation-link": help_page_path('user/analytics/value_stream_analytics.md'),
-      "v-on:dismiss-overview-dialog" => "dismissOverviewDialog()" }
-  .mb-3
-    %h3
-      = _("Value Stream Analytics")
   %gl-loading-icon{ "v-show" => "isLoading", "size" => "lg" }
   .wrapper{ "v-show" => "!isLoading && !hasError" }
     .card

changelogs/unreleased/fix-no-stats-in-vsa.yml

+---
+title: Remove initial data check on project level value stream page
+merge_request: 49936
+author:
+type: performance

ee/spec/models/analytics/cycle_analytics/group_level_spec.rb

@@ -30,17 +30,6 @@ RSpec.describe Analytics::CycleAnalytics::GroupLevel do
     end
   end
 
-  describe '#stats' do
-    before do
-      create_cycle(user, project, issue, mr, milestone, pipeline)
-      deploy_master(user, project)
-    end
-
-    it 'returns medians for each stage for a specific group' do
-      expect(subject.no_stats?).to eq(false)
-    end
-  end
-
   describe '#summary' do
     before do
       create_cycle(user, project, issue, mr, milestone, pipeline)

spec/controllers/projects/cycle_analytics_controller_spec.rb

@@ -32,41 +32,5 @@ RSpec.describe Projects::CycleAnalyticsController do
     end
   end
 
-  describe 'value stream analytics not set up flag' do
-    context 'with no data' do
-      it 'is true' do
-        get(:show,
-            params: {
-              namespace_id: project.namespace,
-              project_id: project
-            })
-
-        expect(response).to be_successful
-        expect(assigns(:cycle_analytics_no_data)).to eq(true)
-      end
-    end
-
-    context 'with data' do
-      before do
-        issue = create(:issue, project: project, created_at: 4.days.ago)
-        milestone = create(:milestone, project: project, created_at: 5.days.ago)
-        issue.update(milestone: milestone)
-
-        create_merge_request_closing_issue(user, project, issue)
-      end
-
-      it 'is false' do
-        get(:show,
-            params: {
-              namespace_id: project.namespace,
-              project_id: project
-            })
-
-        expect(response).to be_successful
-        expect(assigns(:cycle_analytics_no_data)).to eq(false)
-      end
-    end
-  end
-
   include_examples GracefulTimeoutHandling
 end

spec/features/cycle_analytics_spec.rb

@@ -24,10 +24,6 @@ RSpec.describe 'Value Stream Analytics', :js do
         wait_for_requests
       end
 
-      it 'shows introductory message' do
-        expect(page).to have_content('Introducing Value Stream Analytics')
-      end
-
       it 'shows pipeline summary' do
         expect(new_issues_counter).to have_content('-')
         expect(commits_counter).to have_content('-')