[DSL] Remove a duplicate test

There is a completely identical test just above

Author: eliskah

spec/elasticsearch/dsl/search_spec.rb

@@ -328,58 +328,4 @@ def bool_query(obj)
       expect(s.to_hash).to eq(expected_hash)
     end
   end
-
-  describe '#collapse' do
-
-    let(:s) do
-      search do
-        query do
-          match title: 'test'
-        end
-        collapse :user do
-          max_concurrent_group_searches 4
-          inner_hits 'last_tweet' do
-            size 10
-            from 5
-            sort do
-              by :date, order: 'desc'
-              by :likes, order: 'asc'
-            end
-          end
-        end
-      end
-    end
-
-    let(:inner_hits_hash) do
-      { name: 'last_tweet',
-        size: 10,
-        from: 5,
-        sort: [ { date: { order: 'desc' } },
-               { likes: { order: 'asc' } }]
-      }
-    end
-
-    let(:expected_hash) do
-      { query: { match: { title: 'test' } },
-        collapse: { field: :user,
-                    max_concurrent_group_searches: 4,
-                    inner_hits: inner_hits_hash }  }
-    end
-
-    it 'sets the field name' do
-      expect(s.to_hash[:collapse][:field]).to eq(:user)
-    end
-
-    it 'sets the max_concurrent_group_searches option' do
-      expect(s.to_hash[:collapse][:max_concurrent_group_searches]).to eq(4)
-    end
-
-    it 'sets the inner_hits' do
-      expect(s.to_hash[:collapse][:inner_hits]).to eq(inner_hits_hash)
-    end
-
-    it 'constructs the correct hash' do
-      expect(s.to_hash).to eq(expected_hash)
-    end
-  end
 end