Remove Network Policies metrics

.gitlab/CODEOWNERS

.rubocop_todo/layout/hash_alignment.yml

.rubocop_todo/rails/time_zone.yml

.rubocop_todo/rspec/verified_doubles.yml

.rubocop_todo/style/percent_literal_delimiters.yml

config/initializers/1_settings.rb

...ics/counts_all/20210216175446_network_policy_forwards.yml

...etrics/counts_all/20210216175448_network_policy_drops.yml

ee/app/workers/all_queues.yml

ee/app/workers/network_policy_metrics_worker.rb

ee/lib/ee/gitlab/usage_data_counters.rb

...ib/gitlab/prometheus/queries/packet_flow_metrics_query.rb

ee/lib/gitlab/prometheus/queries/packet_flow_query.rb

ee/lib/gitlab/usage_data_counters/network_policy_counter.rb

ee/spec/lib/ee/gitlab/usage_data_spec.rb

...tlab/prometheus/queries/packet_flow_metrics_query_spec.rb

...c/lib/gitlab/prometheus/queries/packet_flow_query_spec.rb

...gitlab/usage_data_counters/network_policy_counter_spec.rb

ee/spec/workers/network_policy_metrics_worker_spec.rb

spec/workers/every_sidekiq_worker_spec.rb