Make all Gitaly diff flags mandatory

lib/gitlab/git/diff_collection.rb

@@ -42,12 +42,10 @@ module Gitlab
         return if @overflow
         return if @iterator.nil?
 
-        Gitlab::GitalyClient.migrate(:commit_raw_diffs) do |is_enabled|
-          if is_enabled && @iterator.is_a?(Gitlab::GitalyClient::DiffStitcher)
+        if @iterator.is_a?(Gitlab::GitalyClient::DiffStitcher)
           each_gitaly_patch(&block)
         else
-            each_rugged_patch(&block)
-          end
+          each_serialized_patch(&block)
         end
 
         @populated = true
@@ -118,7 +116,7 @@ module Gitlab
         end
       end
 
-      def each_rugged_patch
+      def each_serialized_patch
         i = @array.length
 
         @iterator.each do |raw|

lib/gitlab/git/repository.rb

@@ -555,13 +555,7 @@ module Gitlab
       # diff options.  The +options+ hash can also include :break_rewrites to
       # split larger rewrites into delete/add pairs.
       def diff(from, to, options = {}, *paths)
-        iterator = gitaly_migrate(:diff_between) do |is_enabled|
-          if is_enabled
-            gitaly_commit_client.diff(from, to, options.merge(paths: paths))
-          else
-            diff_patches(from, to, options, *paths)
-          end
-        end
+        iterator = gitaly_commit_client.diff(from, to, options.merge(paths: paths))
 
         Gitlab::Git::DiffCollection.new(iterator, options)
       end

lib/gitlab/workhorse.rb

@@ -91,16 +91,12 @@ module Gitlab
       end
 
       def send_git_diff(repository, diff_refs)
-        params = if Gitlab::GitalyClient.feature_enabled?(:workhorse_send_git_diff, status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT)
-                   {
+        params = {
           'GitalyServer' => gitaly_server_hash(repository),
           'RawDiffRequest' => Gitaly::RawDiffRequest.new(
             gitaly_diff_or_patch_hash(repository, diff_refs)
           ).to_json
         }
-                 else
-                   workhorse_diff_or_patch_hash(repository, diff_refs)
-                 end
 
         [
           SEND_DATA_HEADER,

spec/lib/gitlab/workhorse_spec.rb

@@ -143,7 +143,6 @@ describe Gitlab::Workhorse do
     let(:diff_refs) { double(base_sha: "base", head_sha: "head") }
     subject { described_class.send_git_diff(repository, diff_refs) }
 
-    context 'when Gitaly workhorse_send_git_diff feature is enabled' do
     it 'sets the header correctly' do
       key, command, params = decode_workhorse_header(subject)
 
@@ -163,17 +162,6 @@ describe Gitlab::Workhorse do
     end
   end
 
-    context 'when Gitaly workhorse_send_git_diff feature is disabled', :disable_gitaly do
-      it 'sets the header correctly' do
-        key, command, params = decode_workhorse_header(subject)
-
-        expect(key).to eq("Gitlab-Workhorse-Send-Data")
-        expect(command).to eq("git-diff")
-        expect(params).to eq("RepoPath" => repository.path_to_repo, "ShaFrom" => "base", "ShaTo" => "head")
-      end
-    end
-  end
-
   describe ".secret" do
     subject { described_class.secret }