Remove accidently duplicated code

spec/lib/backup/manager_spec.rb

@@ -238,30 +238,6 @@ describe Backup::Manager do
     end
   end
 
-  describe 'verify_restore' do
-    context 'on Version mismatch' do
-      let(:gitlab_version) { Gitlab::VERSION }
-
-      it 'stops the process' do
-        allow(YAML).to receive(:load_file)
-          .and_return({ gitlab_version: "not #{gitlab_version}" })
-
-        expect { subject.verify_restore }.to raise_error SystemExit
-      end
-    end
-
-    context 'on Version match' do
-      let(:gitlab_version) { Gitlab::VERSION }
-
-      it 'does nothing' do
-        allow(YAML).to receive(:load_file)
-          .and_return({ gitlab_version: "#{gitlab_version}" })
-
-        expect { subject.verify_restore }.not_to raise_error
-      end
-    end
-  end
-
   describe '#unpack' do
     context 'when there are no backup files in the directory' do
       before do