Remove PoC spec

spec/models/ci/variable_spec.rb

@@ -6,40 +6,6 @@ describe Ci::Variable, models: true do
   it { is_expected.to be_kind_of(HasVariable) }
   it { is_expected.to validate_uniqueness_of(:key).scoped_to(:project_id) }
 
-  describe 'validates :key' do
-    let(:project) { create(:project) }
-
-    it 'be invalid if it exceeds maximum' do
-      expect do
-        create(:ci_variable, project: project, key: "A"*256)
-      end.to raise_error(ActiveRecord::RecordInvalid)
-    end
-
-    it 'be invalid if violates constraints' do
-      expect do
-        create(:ci_variable, project: project, key: "*")
-      end.to raise_error(ActiveRecord::RecordInvalid)
-    end
-
-    context 'when there is a variable' do
-      before do
-        create(:ci_variable, key: 'AAA', project: project)
-      end
-
-      it 'be valid if it is unique' do
-        expect do
-          create(:ci_variable, project: project, key: 'CCC')
-        end.not_to raise_error
-      end
-
-      it 'be invalid if it is duplicated' do
-        expect do
-          create(:ci_variable, project: project, key: 'AAA')
-        end.to raise_error(ActiveRecord::RecordInvalid)
-      end
-    end
-  end
-
   describe '.unprotected' do
     subject { described_class.unprotected }