Remove dead code: Service#find_by_template

Original commit 93e9793c.

app/models/service.rb

@@ -319,10 +319,6 @@ class Service < ApplicationRecord
     nil
   end
 
-  def self.find_by_template
-    find_by(template: true)
-  end
-
   # override if needed
   def supports_data_fields?
     false

spec/fixtures/trace/sample_trace

@@ -2772,8 +2772,6 @@ Service
     should return false by default
   #deprecation_message
     should be empty by default
-  .find_by_template
-    returns service template
   #api_field_names
     filters out sensitive fields
 

spec/models/service_spec.rb

@@ -406,14 +406,6 @@ describe Service do
     end
   end
 
-  describe '.find_by_template' do
-    let!(:service) { create(:service, template: true) }
-
-    it 'returns service template' do
-      expect(described_class.find_by_template).to eq(service)
-    end
-  end
-
   describe '#api_field_names' do
     let(:fake_service) do
       Class.new(Service) do