diff --git a/src/api/Gemfile b/src/api/Gemfile
index 2f2c293dc76..70fdcc67d04 100644
--- a/src/api/Gemfile
+++ b/src/api/Gemfile
@@ -134,8 +134,6 @@ end
 group :development do
   # as alternative to the standard IRB shell
   gem 'unicorn-rails' # webrick won't work
-  # for annotating models with schema info
-  gem 'annotate'
 end
 
 group :development, :test do
diff --git a/src/api/Gemfile.lock b/src/api/Gemfile.lock
index 01356a6d985..97948d90ae3 100644
--- a/src/api/Gemfile.lock
+++ b/src/api/Gemfile.lock
@@ -56,9 +56,6 @@ GEM
       airbrake-ruby (~> 2.5)
     airbrake-ruby (2.5.0)
     amq-protocol (2.3.0)
-    annotate (2.7.4)
-      activerecord (>= 3.2, < 6.0)
-      rake (>= 10.4, < 13.0)
     ansi (1.5.0)
     arel (9.0.0)
     ast (2.4.0)
@@ -421,7 +418,6 @@ DEPENDENCIES
   addressable
   airbrake (<= 7.1.0)
   airbrake-ruby (<= 2.5.0)
-  annotate
   bcrypt
   bullet
   bunny
diff --git a/src/api/lib/tasks/auto_annotate_models.rake b/src/api/lib/tasks/auto_annotate_models.rake
deleted file mode 100644
index 72b6529bf8b..00000000000
--- a/src/api/lib/tasks/auto_annotate_models.rake
+++ /dev/null
@@ -1,48 +0,0 @@
-# NOTE: only doing this in development as some production environments (Heroku)
-# NOTE: are sensitive to local FS writes, and besides -- it's just not proper
-# NOTE: to have a dev-mode tool do its thing in production.
-if Rails.env.development?
-  task :set_annotation_options do
-    # You can override any of these by setting an environment variable of the
-    # same name.
-    Annotate.set_defaults(
-      'routes'                  => 'false',
-      'position_in_routes'      => 'before',
-      'position_in_class'       => 'after',
-      'position_in_test'        => 'before',
-      'position_in_fixture'     => 'before',
-      'position_in_factory'     => 'before',
-      'position_in_serializer'  => 'before',
-      'show_foreign_keys'       => 'true',
-      'show_indexes'            => 'true',
-      'simple_indexes'          => 'true',
-      'model_dir'               => 'app/models',
-      'root_dir'                => '',
-      'include_version'         => 'false',
-      'require'                 => '',
-      'exclude_tests'           => 'true',
-      'exclude_fixtures'        => 'true',
-      'exclude_factories'       => 'true',
-      'exclude_serializers'     => 'true',
-      'exclude_scaffolds'       => 'true',
-      'exclude_controllers'     => 'true',
-      'exclude_helpers'         => 'true',
-      'ignore_model_sub_dir'    => 'false',
-      'ignore_columns'          => nil,
-      'ignore_routes'           => nil,
-      'ignore_unknown_models'   => 'false',
-      'hide_limit_column_types' => 'integer,boolean',
-      'skip_on_db_migrate'      => 'false',
-      'format_bare'             => 'true',
-      'format_rdoc'             => 'false',
-      'format_markdown'         => 'false',
-      'sort'                    => 'false',
-      'force'                   => 'false',
-      'trace'                   => 'false',
-      'wrapper_open'            => nil,
-      'wrapper_close'           => nil
-    )
-  end
-
-  Annotate.load_tasks
-end