Remove duplicate whens

spec/lib/gitlab/graphql/deprecation_spec.rb

@@ -241,13 +241,13 @@
   describe '#alpha?' do
     let(:options) { { milestone: '10.10', reason: reason } }
 
-    context 'when when `reason` is `:alpha`' do
+    context 'when `reason` is `:alpha`' do
       let(:reason) { described_class::REASON_ALPHA }
 
       it { is_expected.to be_alpha }
     end
 
-    context 'when when `reason` is not `:alpha`' do
+    context 'when `reason` is not `:alpha`' do
       let(:reason) { described_class::REASON_RENAMED }
 
       it { is_expected.not_to be_alpha }