Remove the `ForkedProjectLink` model

This removes the `ForkedProjectLink` model that has been replaced by
the `ForkNetworkMember` and `ForkNetwork` combination. All existing
relations have been adjusted to use these new models.

The `forked_project_link` table has been dropped.

The "Forks" count on the admin dashboard has been updated to count all
`ForkNetworkMember` rows and deduct the number of `ForkNetwork`
rows. This is because now the "root-project" of a fork network also
has a `ForkNetworkMember` row. This count could become inaccurate when
the root of a fork network is deleted.

1 files changed, 8 insertions, 7 deletions

diff --git a/spec/finders/fork_projects_finder_spec.rb b/spec/finders/fork_projects_finder_spec.rb
index f0cef7ea406..b3fdffc3331 100644
--- a/spec/finders/fork_projects_finder_spec.rb
+++ b/spec/finders/fork_projects_finder_spec.rb
@@ -1,20 +1,21 @@
 require 'spec_helper'
 
 describe ForkProjectsFinder do
-  let(:source_project) { create(:project, :empty_repo) }
-  let(:private_fork) { create(:project, :private, :empty_repo, name: 'A') }
-  let(:internal_fork) { create(:project, :internal, :empty_repo, name: 'B') }
-  let(:public_fork) { create(:project, :public, :empty_repo, name: 'C') }
+  include ProjectForksHelper
+
+  let(:source_project) { create(:project, :public, :empty_repo) }
+  let(:private_fork) { fork_project(source_project, nil, name: 'A') }
+  let(:internal_fork) { fork_project(source_project, nil, name: 'B') }
+  let(:public_fork) { fork_project(source_project, nil, name: 'C') }
 
   let(:non_member) { create(:user) }
   let(:private_fork_member) { create(:user) }
 
   before do
+    private_fork.update!(visibility_level: Gitlab::VisibilityLevel::PRIVATE)
     private_fork.add_developer(private_fork_member)
 
-    source_project.forks << private_fork
-    source_project.forks << internal_fork
-    source_project.forks << public_fork
+    internal_fork.update!(visibility_level: Gitlab::VisibilityLevel::INTERNAL)
   end
 
   describe '#execute' do