Revert "Merge branch 'zj-unit-test-gitaly-arrays' into 'master'"

spec/lib/gitlab/git/blob_spec.rb

@@ -276,7 +276,6 @@ describe Gitlab::Git::Blob, seed_helper: true do
 
         expect(blobs.count).to eq(1)
         expect(blobs).to all( be_a(Gitlab::Git::Blob) )
-        expect(blobs).to be_an(Array)
       end
 
       it 'accepts blob IDs as a lazy enumerator' do

spec/lib/gitlab/git/commit_spec.rb

@@ -102,10 +102,6 @@ describe Gitlab::Git::Commit, seed_helper: true do
         expect(described_class.find(repository, SeedRepo::Commit::ID)).to be_valid_commit
       end
 
-      it "returns an array of parent ids" do
-        expect(described_class.find(repository, SeedRepo::Commit::ID).parent_ids).to be_an(Array)
-      end
-
       it "should return valid commit for tag" do
         expect(described_class.find(repository, 'v1.0.0').id).to eq('6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9')
       end