Move eraseable implementation to build concern

app/models/ci/build.rb

@@ -35,10 +35,9 @@
 
 module Ci
   class Build < CommitStatus
-    include Compoundable
-    component :eraseable, Gitlab::Ci::Build::Eraseable
-
     include Gitlab::Application.routes.url_helpers
+    include Eraseable
+
     LAZY_ATTRIBUTES = ['trace']
 
     belongs_to :runner, class_name: 'Ci::Runner'

app/models/ci/build/eraseable.rb

+module Ci
+  class Build
+    module Eraseable
+      include ActiveSupport::Concern
+
+      def erase!
+        raise NotImplementedError
+      end
+
+      def erased?
+        raise NotImpementedError
+      end
+    end
+  end
+end

app/models/concerns/compoundable.rb

-module Compoundable
-  extend ActiveSupport::Concern
-
-  class_methods do
-    private
-
-    def component(name, klass)
-      define_method(name) do
-        component_object = instance_variable_get("@#{name}")
-        return component_object if component_object
-        instance_variable_set("@#{name}", klass.new(self))
-      end
-
-      klass.instance_methods(false).each do |method|
-        delegate method, to: name
-      end
-    end
-  end
-end

lib/gitlab/ci/build/eraseable.rb

-module Gitlab
-  module Ci
-    module Build
-      class Eraseable
-        def initialize(build)
-          @build = build
-        end
-
-        def erase!
-          raise NotImplementedError
-        end
-
-        def erased?
-          @build.artifacts_file.exists? && @build.artifacts_metadata.exists?
-        end
-
-        private
-
-        def trace_file
-          raise NotImplementedError
-        end
-      end
-    end
-  end
-end