1 files changed, 0 insertions, 110 deletions
diff --git a/lib/gitlab/experimentation.rb b/lib/gitlab/experimentation.rb
deleted file mode 100644
index 142d0e55593..00000000000
--- a/lib/gitlab/experimentation.rb
+++ /dev/null
@@ -1,110 +0,0 @@
-# frozen_string_literal: true
-
-# == Experimentation
-#
-# Utility module for A/B testing experimental features. Define your experiments in the `EXPERIMENTS` constant.
-# Experiment options:
-# - tracking_category (optional, used to set the category when tracking an experiment event)
-# - rollout_strategy: default is `:cookie` based rollout. We may also set it to `:user` based rollout
-#
-# The experiment is controlled by a Feature Flag (https://docs.gitlab.com/ee/development/feature_flags/controls.html),
-# which is named "#{experiment_key}_experiment_percentage" and *must* be set with a percentage and not be used for other purposes.
-#
-# To enable the experiment for 10% of the time:
-#
-# chatops: `/chatops run feature set experiment_key_experiment_percentage 10 --random`
-# console: `Feature.enable_percentage_of_time(:experiment_key_experiment_percentage, 10)`
-#
-# To disable the experiment:
-#
-# chatops: `/chatops run feature delete experiment_key_experiment_percentage`
-# console: `Feature.remove(:experiment_key_experiment_percentage)`
-#
-# To check the current rollout percentage:
-#
-# chatops: `/chatops run feature get experiment_key_experiment_percentage`
-# console: `Feature.get(:experiment_key_experiment_percentage).percentage_of_time_value`
-#
-
-# TODO: see https://gitlab.com/gitlab-org/gitlab/-/issues/217490
-module Gitlab
-  module Experimentation
-    EXPERIMENTS = {
-    }.freeze
-
-    class << self
-      def get_experiment(experiment_key)
-        return unless EXPERIMENTS.key?(experiment_key)
-
-        ::Gitlab::Experimentation::Experiment.new(experiment_key, **EXPERIMENTS[experiment_key])
-      end
-
-      def active?(experiment_key)
-        experiment = get_experiment(experiment_key)
-        return false unless experiment
-
-        experiment.active?
-      end
-
-      def in_experiment_group?(experiment_key, subject:)
-        return false if subject.blank?
-        return false unless active?(experiment_key)
-
-        log_invalid_rollout(experiment_key, subject)
-
-        experiment = get_experiment(experiment_key)
-        return false unless experiment
-
-        experiment.enabled_for_index?(index_for_subject(experiment, subject))
-      end
-
-      def rollout_strategy(experiment_key)
-        experiment = get_experiment(experiment_key)
-        return unless experiment
-
-        experiment.rollout_strategy
-      end
-
-      def log_invalid_rollout(experiment_key, subject)
-        return if valid_subject_for_rollout_strategy?(experiment_key, subject)
-
-        logger = Gitlab::ExperimentationLogger.build
-        logger.warn message: 'Subject must conform to the rollout strategy',
-                    experiment_key: experiment_key,
-                    subject: subject.class.to_s,
-                    rollout_strategy: rollout_strategy(experiment_key)
-      end
-
-      def valid_subject_for_rollout_strategy?(experiment_key, subject)
-        case rollout_strategy(experiment_key)
-        when :user
-          subject.is_a?(User)
-        when :group
-          subject.is_a?(Group)
-        when :cookie
-          subject.nil? || subject.is_a?(String)
-        else
-          false
-        end
-      end
-
-      private
-
-      def index_for_subject(experiment, subject)
-        index = Zlib.crc32("#{experiment.key}#{subject_id(subject)}")
-
-        index % 100
-      end
-
-      def subject_id(subject)
-        if subject.respond_to?(:to_global_id)
-          subject.to_global_id.to_s
-        elsif subject.respond_to?(:to_s)
-          subject.to_s
-        else
-          raise ArgumentError, 'Subject must respond to `to_global_id` or `to_s`'
-        end
-      end
-    end
-  end
-end