Remove some deprecated methods

To avoid the use of slow queries, remove some deprecated methods and encourage
the use of ProjectFinder to find projects.

app/controllers/dashboard_controller.rb

@@ -24,7 +24,7 @@ class DashboardController < Dashboard::ApplicationController
   def load_events
     projects =
       if params[:filter] == "starred"
-        current_user.viewable_starred_projects
+        ProjectsFinder.new(current_user: current_user, params: { starred: true }).execute
       else
         current_user.authorized_projects
       end

app/models/project.rb

@@ -351,10 +351,6 @@ class Project < ActiveRecord::Base
       where("projects.id IN (#{union.to_sql})")
     end
 
-    def search_by_visibility(level) # DEPRECATED: remove with API V3
-      where(visibility_level: Gitlab::VisibilityLevel.string_options[level])
-    end
-
     def search_by_title(query)
       pattern = "%#{query}%"
       table   = Project.arel_table

app/models/user.rb

@@ -557,12 +557,6 @@ class User < ActiveRecord::Base
     authorized_projects(Gitlab::Access::REPORTER).where(id: projects)
   end
 
-  def viewable_starred_projects # DEPRECATED: Use ProjectFinder instead. Remove together with API V3
-    starred_projects.where("projects.visibility_level IN (?) OR projects.id IN (?)",
-                           [Project::PUBLIC, Project::INTERNAL],
-                           authorized_projects.select(:project_id))
-  end
-
   def owned_projects
     @owned_projects ||=
       Project.where('namespace_id IN (?) OR namespace_id = ?',

lib/api/v3/helpers.rb

@@ -35,7 +35,7 @@ module API
         end
 
         if params[:visibility].present?
-          projects = projects.search_by_visibility(params[:visibility])
+          projects = projects.where(visibility_level: Gitlab::VisibilityLevel.level_value(params[:visibility]))
         end
 
         projects = projects.where(archived: params[:archived])

lib/api/v3/projects.rb

@@ -147,7 +147,7 @@ module API
         get '/starred' do
           authenticate!
 
-          present_projects current_user.viewable_starred_projects
+          present_projects ProjectsFinder.new(current_user: current_user, params: { starred: true }).execute
         end
 
         desc 'Get all projects for admin user' do

spec/models/user_spec.rb

@@ -1496,25 +1496,6 @@ describe User, models: true do
     end
   end
 
-  describe '#viewable_starred_projects' do
-    let(:user) { create(:user) }
-    let(:public_project) { create(:empty_project, :public) }
-    let(:private_project) { create(:empty_project, :private) }
-    let(:private_viewable_project) { create(:empty_project, :private) }
-
-    before do
-      private_viewable_project.team << [user, Gitlab::Access::MASTER]
-
-      [public_project, private_project, private_viewable_project].each do |project|
-        user.toggle_star(project)
-      end
-    end
-
-    it 'returns only starred projects the user can view' do
-      expect(user.viewable_starred_projects).not_to include(private_project)
-    end
-  end
-
   describe '#projects_with_reporter_access_limited_to' do
     let(:project1) { create(:empty_project) }
     let(:project2) { create(:empty_project) }