Remove references to nonexistent feature flag

Apparently the g_compliance_dashboard_feature never existed. It was
used as an example in documentation and test coverage, so a YAML file
was created for it as if it was an actual feature flag. This deletes
that YAML file and replaces all references with actual feature flag
names. This should avert future confusion.

config/feature_flags/development/g_compliance_dashboard_feature.yml

----
-name: g_compliance_dashboard_feature
-introduced_by_url: 
-rollout_issue_url: 
-group: 
-type: development
-default_enabled: true

doc/development/product_analytics/usage_ping.md

@@ -330,7 +330,7 @@ Implemented using Redis methods [PFADD](https://redis.io/commands/pfadd) and [PF
      include RedisTracking
 
      skip_before_action :authenticate_user!, only: :show
-     track_redis_hll_event :index, :show, name: 'i_analytics_dev_ops_score', feature: :g_compliance_dashboard_feature, feature_default_enabled: true
+     track_redis_hll_event :index, :show, name: 'g_compliance_example_feature_visitors', feature: :compliance_example_feature, feature_default_enabled: true
 
      def index
        render html: 'index'

spec/controllers/concerns/redis_tracking_spec.rb

@@ -3,15 +3,14 @@
 require "spec_helper"
 
 RSpec.describe RedisTracking do
-  let(:event_name) { 'g_compliance_dashboard' }
-  let(:feature) { 'g_compliance_dashboard_feature' }
+  let(:feature) { 'approval_rule' }
   let(:user) { create(:user) }
 
   controller(ApplicationController) do
     include RedisTracking
 
     skip_before_action :authenticate_user!, only: :show
-    track_redis_hll_event :index, :show, name: 'i_analytics_dev_ops_score', feature: :g_compliance_dashboard_feature, feature_default_enabled: true
+    track_redis_hll_event :index, :show, name: 'g_compliance_approval_rules', feature: :approval_rule, feature_default_enabled: true
 
     def index
       render html: 'index'