Remove unused Card.published_or_drafted_by scope

As the tests for it could lead to confusion where it seems drafted cards
are not accessible to someone with access to the board and with the
direct drafted card URL.

app/models/card/statuses.rb

@@ -6,8 +6,6 @@ module Card::Statuses
 
     before_save :mark_if_just_published
     after_create -> { track_event :published }, if: :published?
-
-    scope :published_or_drafted_by, ->(user) { where(status: :published).or(where(status: :drafted, creator: user)) }
   end
 
   attr_accessor :was_just_published

test/models/card/statuses_test.rb

@@ -11,22 +11,6 @@ class Card::StatusesTest < ActiveSupport::TestCase
     assert card.drafted?
   end
 
-  test "cards are only visible to the creator when drafted" do
-    card = boards(:writebook).cards.create! creator: users(:kevin), title: "Drafted Card"
-    card.drafted!
-
-    assert_includes Card.published_or_drafted_by(users(:kevin)), card
-    assert_not_includes Card.published_or_drafted_by(users(:jz)), card
-  end
-
-  test "cards are visible to everyone when published" do
-    card = boards(:writebook).cards.create! creator: users(:kevin), title: "Published Card"
-    card.published!
-
-    assert_includes Card.published_or_drafted_by(users(:kevin)), card
-    assert_includes Card.published_or_drafted_by(users(:jz)), card
-  end
-
   test "an event is created when a card is created in the published state" do
     assert_no_difference(-> { Event.count }) do
       boards(:writebook).cards.create! creator: users(:kevin), title: "Draft Card"