License detection happens soley through Gitaly now

Migration: https://gitlab.com/gitlab-org/gitaly/issues/1026

Conflicts:
	lib/gitlab/git/repository.rb

lib/gitlab/git/repository.rb

@@ -1054,18 +1054,8 @@ module Gitlab
       end
       def license_short_name
-        gitaly_migrate(:license_short_name,
-                       status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT) do |is_enabled|
-          if is_enabled
-            gitaly_repository_client.license_short_name
-          else
-            begin
-              # The licensee gem creates a Rugged object from the path:
-              # https://github.com/benbalter/licensee/blob/v8.7.0/lib/licensee/projects/git_project.rb
-              Licensee.license(path).try(:key)
-            rescue Rugged::Error
-            end
-          end
+        wrapped_gitaly_errors do
+          gitaly_repository_client.license_short_name
         end
       end

spec/lib/gitlab/git/repository_spec.rb

@@ -1727,31 +1727,21 @@ describe Gitlab::Git::Repository, seed_helper: true do
   end
   describe '#license_short_name' do
-    shared_examples 'acquiring the Licensee license key' do
-      subject { repository.license_short_name }
-      context 'when no license file can be found' do
-        let(:project) { create(:project, :repository) }
-        let(:repository) { project.repository.raw_repository }
-
-        before do
-          project.repository.delete_file(project.owner, 'LICENSE', message: 'remove license', branch_name: 'master')
-        end
-
-        it { is_expected.to be_nil }
-      end
-      context 'when an mit license is found' do
-        it { is_expected.to eq('mit') }
+    subject { repository.license_short_name }
+    context 'when no license file can be found' do
+      let(:project) { create(:project, :repository) }
+      let(:repository) { project.repository.raw_repository }
+      before do
+        project.repository.delete_file(project.owner, 'LICENSE', message: 'remove license', branch_name: 'master')
       end
-    end
-    context 'when gitaly is enabled' do
-      it_behaves_like 'acquiring the Licensee license key'
+      it { is_expected.to be_nil }
     end
-    context 'when gitaly is disabled', :disable_gitaly do
-      it_behaves_like 'acquiring the Licensee license key'
+    context 'when an mit license is found' do
+      it { is_expected.to eq('mit') }
     end
   end