drop the ! from synchronize_service_state! + remove unused scope

app/models/clusters/cluster.rb

@@ -49,8 +49,6 @@ module Clusters
     scope :enabled, -> { where(enabled: true) }
     scope :disabled, -> { where(enabled: false) }
 
-    scope :for_environment, -> (env) { where(environment_scope: ['*', '', env.slug]) }
-
     def status_name
       if provider
         provider.status_name

app/models/project_services/prometheus_service.rb

@@ -9,7 +9,7 @@ class PrometheusService < MonitoringService
     validates :api_url, url: true
   end
 
-  before_save :synchronize_service_state!
+  before_save :synchronize_service_state
 
   after_save :clear_reactive_cache!
 
@@ -82,7 +82,7 @@ class PrometheusService < MonitoringService
 
   private
 
-  def synchronize_service_state!
+  def synchronize_service_state
     self.active = prometheus_installed? || manual_configuration?
 
     true

spec/models/project_services/prometheus_service_spec.rb

@@ -117,7 +117,7 @@ describe PrometheusService, :use_clean_rails_memory_store_caching do
     end
   end
 
-  describe '#synchronize_service_state! before_save callback' do
+  describe '#synchronize_service_state before_save callback' do
     context 'no clusters with prometheus are installed' do
       context 'when service is inactive' do
         before do