Remove legacy method from create build service

app/models/ci/pipeline.rb

@@ -284,6 +284,9 @@ module Ci
       end
     end
 
+    ##
+    # TODO, phase this method out
+    #
     def config_builds_attributes
       return [] unless config_processor
 

app/services/ci/create_pipeline_stages_service.rb

@@ -23,6 +23,7 @@ module Ci
         user: current_user,
         trigger_request: trigger_request
       )
+
       build = pipeline.builds.create(build_attributes)
 
       # Create the environment before the build starts. This sets its slug and
@@ -34,17 +35,10 @@ module Ci
     end
 
     def new_builds
-      @new_builds ||= pipeline.config_builds_attributes.
-        reject { |build| existing_build_names.include?(build[:name]) }
-    end
-
-    def existing_build_names
-      @existing_build_names ||= pipeline.builds.pluck(:name)
+      @new_builds ||= pipeline.config_builds_attributes
     end
 
     def trigger_request
-      return @trigger_request if defined?(@trigger_request)
-
       @trigger_request ||= pipeline.trigger_requests.first
     end
   end