Cleans up some build specs

spec/models/ci/build_spec.rb

@@ -821,45 +821,6 @@ RSpec.describe Ci::Build do
       { cache: [{ key: "key", paths: ["public"], policy: "pull-push" }] }
     end
 
-    context 'with multiple_cache_per_job FF disabled' do
-      before do
-        stub_feature_flags(multiple_cache_per_job: false)
-      end
-      let(:options) { { cache: { key: "key", paths: ["public"], policy: "pull-push" } } }
-
-      subject { build.cache }
-
-      context 'when build has cache' do
-        before do
-          allow(build).to receive(:options).and_return(options)
-        end
-
-        context 'when project has jobs_cache_index' do
-          before do
-            allow_any_instance_of(Project).to receive(:jobs_cache_index).and_return(1)
-          end
-
-          it { is_expected.to be_an(Array).and all(include(key: "key-1")) }
-        end
-
-        context 'when project does not have jobs_cache_index' do
-          before do
-            allow_any_instance_of(Project).to receive(:jobs_cache_index).and_return(nil)
-          end
-
-          it { is_expected.to eq([options[:cache]]) }
-        end
-      end
-
-      context 'when build does not have cache' do
-        before do
-          allow(build).to receive(:options).and_return({})
-        end
-
-        it { is_expected.to eq([]) }
-      end
-    end
-
     subject { build.cache }
 
     context 'when build has cache' do