diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 0901b61e..7787e9e2 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -195,14 +195,6 @@ RSpec/DescribeClass:
     - 'spec/models/concerns/releaseable_no_vcr_spec.rb'
     - 'spec/services/cleanup_service_filesystem_spec.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: SkipBlocks, EnforcedStyle.
-# SupportedStyles: described_class, explicit
-RSpec/DescribedClass:
-  Exclude:
-    - 'spec/utils/sdr_client_spec.rb'
-
 # Offense count: 131
 # Configuration parameters: Max.
 RSpec/ExampleLength:
diff --git a/lib/dor-services.rb b/lib/dor-services.rb
index 7c5b2bda..1a60b6c9 100644
--- a/lib/dor-services.rb
+++ b/lib/dor-services.rb
@@ -4,7 +4,6 @@
 require 'active_fedora/version'
 require 'active_support/core_ext/module/attribute_accessors'
 require 'active_support/core_ext/object/blank'
-require 'dor/utils/sdr_client'
 
 module Dor
   extend ActiveSupport::Autoload
diff --git a/lib/dor/config.rb b/lib/dor/config.rb
index 8ccf3a38..1880435d 100644
--- a/lib/dor/config.rb
+++ b/lib/dor/config.rb
@@ -63,9 +63,6 @@ def make_solr_connection(add_opts = {})
         purl_services: {
           rest_client: Confstruct.deferred { |_c| RestResourceFactory.create(:purl_services) }
         },
-        sdr: {
-          rest_client: Confstruct.deferred { |_c| RestResourceFactory.create(:sdr) }
-        },
         workflow: {
           client: Confstruct.deferred do |c|
             @wfs ||= Dor::Workflow::Client.new(url: c.url, logger: c.client_logger, timeout: c.timeout)
diff --git a/lib/dor/utils/sdr_client.rb b/lib/dor/utils/sdr_client.rb
deleted file mode 100644
index cf02c67c..00000000
--- a/lib/dor/utils/sdr_client.rb
+++ /dev/null
@@ -1,35 +0,0 @@
-# frozen_string_literal: true
-
-require 'moab'
-module Sdr
-  class Client
-    class << self
-      # @param [String] druid id of the object you want the version of
-      # @return [Integer] the current version from SDR
-      def current_version(druid)
-        xml = client["objects/#{druid}/current_version"].get
-
-        begin
-          doc = Nokogiri::XML xml
-          raise if doc.root.name != 'currentVersion'
-
-          return Integer(doc.text)
-        rescue StandardError
-          raise "Unable to parse XML from SDR current_version API call: #{xml}"
-        end
-      end
-
-      def client
-        if Dor::Config.sdr.url
-          # dor-services-app takes this path
-          Dor::Config.sdr.rest_client
-        elsif Dor::Config.dor_services.url
-          # Anything that is not dor-servics-app should be through here.
-          raise 'you are using dor-services to invoke calls to dor-services-app.  Use dor-services-client instead.'
-        else
-          raise Dor::ParameterError, 'Missing Dor::Config.sdr and/or Dor::Config.dor_services configuration'
-        end
-      end
-    end
-  end
-end
diff --git a/spec/utils/sdr_client_spec.rb b/spec/utils/sdr_client_spec.rb
deleted file mode 100644
index 652d8dc4..00000000
--- a/spec/utils/sdr_client_spec.rb
+++ /dev/null
@@ -1,63 +0,0 @@
-# frozen_string_literal: true
-
-require 'spec_helper'
-require 'dor/utils/sdr_client'
-
-RSpec.describe Sdr::Client do
-  describe '.get_current_version' do
-    it 'returns the current of the object from SDR' do
-      stub_request(:get, described_class.client['objects/druid:ab123cd4567/current_version'].url)
-        .to_return(body: '<currentVersion>2</currentVersion>')
-      expect(described_class.current_version('druid:ab123cd4567')).to eq 2
-    end
-
-    context 'raises an exception if the xml' do
-      it 'has the wrong root element' do
-        stub_request(:get, described_class.client['objects/druid:ab123cd4567/current_version'].url)
-          .to_return(body: '<wrongRoot>2</wrongRoot>')
-        expect { described_class.current_version('druid:ab123cd4567') }
-          .to raise_error(Exception, 'Unable to parse XML from SDR current_version API call: <wrongRoot>2</wrongRoot>')
-      end
-
-      it 'does not contain an Integer as its text' do
-        stub_request(:get, described_class.client['objects/druid:ab123cd4567/current_version'].url)
-          .to_return(body: '<currentVersion>two</currentVersion>')
-        expect { described_class.current_version('druid:ab123cd4567') }
-          .to raise_error(Exception, 'Unable to parse XML from SDR current_version API call: <currentVersion>two</currentVersion>')
-      end
-    end
-  end
-
-  describe '.client' do
-    context 'with SDR configuration' do
-      before do
-        allow(Dor::Config.sdr).to receive(:url).and_return('http://example.com')
-      end
-
-      it 'is configured to use SDR' do
-        expect(described_class.client.url).to eq 'http://example.com'
-      end
-    end
-
-    context 'with DOR services configuration' do
-      before do
-        allow(Dor::Config.sdr).to receive(:url).and_return(nil)
-      end
-
-      it 'is configured to use SDR' do
-        expect { Sdr::Client.client }.to raise_error 'you are using dor-services to invoke calls to dor-services-app.  Use dor-services-client instead.'
-      end
-    end
-
-    context 'without any configuration' do
-      before do
-        allow(Dor::Config.sdr).to receive(:url).and_return(nil)
-        allow(Dor::Config.dor_services).to receive(:url).and_return(nil)
-      end
-
-      it 'raises an exception' do
-        expect { described_class.client }.to raise_error Dor::ParameterError
-      end
-    end
-  end
-end