Remove FF validate_scheduling_type_of_processables

app/models/ci/processable.rb

@@ -49,7 +49,7 @@ module Ci
     end
 
     validates :type, presence: true
-    validates :scheduling_type, presence: true, on: :create, if: :validate_scheduling_type?
+    validates :scheduling_type, presence: true, on: :create, unless: :importing?
 
     delegate :merge_request?,
       :merge_request_ref?,
@@ -99,11 +99,5 @@ module Ci
         needs.map { |need| need.attributes.except('id', 'build_id') }
       end
     end
-
-    private
-
-    def validate_scheduling_type?
-      !importing? && Feature.enabled?(:validate_scheduling_type_of_processables, project)
-    end
   end
 end

spec/models/ci/processable_spec.rb

@@ -52,18 +52,12 @@ describe Ci::Processable do
 
     subject { build(:ci_build, project: project, pipeline: pipeline, importing: importing) }
 
-    where(:importing, :validate_scheduling_type_flag, :should_validate) do
-      false | true  | true
-      false | false | false
-      true  | true  | false
-      true  | false | false
+    where(:importing, :should_validate) do
+      false | true
+      true  | false
     end
 
     with_them do
-      before do
-        stub_feature_flags(validate_scheduling_type_of_processables: validate_scheduling_type_flag)
-      end
-
       context 'on create' do
         it 'validates presence' do
           if should_validate