Remove support for old style pagination cursors

in GraphQL

lib/gitlab/graphql/connections/keyset/connection.rb

@@ -137,14 +137,7 @@ module Gitlab
           def ordering_from_encoded_json(cursor)
             JSON.parse(decode(cursor))
           rescue JSON::ParserError
-            # for the transition period where a client might request using an
-            # old style cursor.  Once removed, make it an error:
-            #   raise Gitlab::Graphql::Errors::ArgumentError, "Please provide a valid cursor"
-            # TODO can be removed in next release
-            # https://gitlab.com/gitlab-org/gitlab/issues/32933
-            field_name = order_list.first.attribute_name
-
-            { field_name => decode(cursor) }
+            raise Gitlab::Graphql::Errors::ArgumentError, "Please provide a valid cursor"
           end
         end
       end

spec/lib/gitlab/graphql/connections/keyset/connection_spec.rb

@@ -218,23 +218,11 @@ describe Gitlab::Graphql::Connections::Keyset::Connection do
       end
     end
 
-    # TODO Enable this as part of below issue
-    # https://gitlab.com/gitlab-org/gitlab/issues/32933
-    # context 'when an invalid cursor is provided' do
-    #   let(:arguments) { { before: 'invalidcursor' } }
-    #
-    #   it 'raises an error' do
-    #     expect { expect(subject.sliced_nodes) }.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
-    #   end
-    # end
-
-    # TODO Remove this as part of below issue
-    # https://gitlab.com/gitlab-org/gitlab/issues/32933
-    context 'when an old style cursor is provided' do
-      let(:arguments) { { before: Base64Bp.urlsafe_encode64(projects[1].id.to_s, padding: false) } }
+    context 'when an invalid cursor is provided' do
+      let(:arguments) { { before: Base64Bp.urlsafe_encode64('invalidcursor', padding: false) } }
 
-      it 'only returns the project before the selected one' do
-        expect(subject.sliced_nodes).to contain_exactly(projects.first)
+      it 'raises an error' do
+        expect { expect(subject.sliced_nodes) }.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
       end
     end
   end