drop backwards compatibility for valid_signature

app/models/gpg_signature.rb

@@ -20,14 +20,6 @@ class GpgSignature < ActiveRecord::Base
   validates :project_id, presence: true
   validates :gpg_key_primary_keyid, presence: true
 
-  # backwards compatibility: legacy records that weren't migrated to use the
-  # new `#verification_status` have `#valid_signature` set instead
-  def verified?
-    return valid_signature if verification_status.nil?
-
-    super
-  end
-
   def gpg_key_primary_keyid
     super&.upcase
   end

lib/gitlab/gpg/invalid_gpg_signature_updater.rb

@@ -6,15 +6,9 @@ module Gitlab
       end
 
       def run
-        # `OR valid_signature` is for backwards compatibility: legacy records
-        # that weren't migrated to use the new `#verification_status` have
-        # `#valid_signature` set instead
         GpgSignature
           .select(:id, :commit_sha, :project_id)
-          .where('gpg_key_id IS NULL OR valid_signature = ? OR verification_status <> ?',
-            false,
-            GpgSignature.verification_statuses[:verified]
-          )
+          .where('gpg_key_id IS NULL OR verification_status <> ?', GpgSignature.verification_statuses[:verified])
           .where(gpg_key_primary_keyid: @gpg_key.primary_keyid)
           .find_each { |sig| sig.gpg_commit.update_signature!(sig) }
       end

spec/models/gpg_signature_spec.rb

@@ -25,34 +25,4 @@ RSpec.describe GpgSignature do
       gpg_signature.commit
     end
   end
-
-  describe '#verified?' do
-    it 'returns true when `verification_status` is not set, but `valid_signature` is true' do
-      signature = create :gpg_signature, valid_signature: true, verification_status: nil
-
-      expect(signature.verified?).to be true
-      expect(signature.reload.verified?).to be true
-    end
-
-    it 'returns true when `verification_status` is set to :verified' do
-      signature = create :gpg_signature, verification_status: :verified
-
-      expect(signature.verified?).to be true
-      expect(signature.reload.verified?).to be true
-    end
-
-    it 'returns false when `verification_status` is set to :unknown_key' do
-      signature = create :gpg_signature, verification_status: :unknown_key
-
-      expect(signature.verified?).to be false
-      expect(signature.reload.verified?).to be false
-    end
-
-    it 'returns false when `verification_status` is not set, but `valid_signature` is false' do
-      signature = create :gpg_signature, valid_signature: false, verification_status: nil
-
-      expect(signature.verified?).to be false
-      expect(signature.reload.verified?).to be false
-    end
-  end
 end