Remove JFIF hack from #343

Not needed since libvips/libvips#3775 was fixed

Author: northeastprince

app/models/hackathon/branded.rb

@@ -15,14 +15,5 @@ module Hackathon::Branded
 
     validates :logo, :banner, on: :submit, attached: true,
       size: {less_than: 25.megabytes, message: "is too powerful (max 25 MB)"}
-
-    before_validation :jfif_to_jpeg, if: -> { attachment_changes.any? }, on: :create
-  end
-
-  private
-
-  def jfif_to_jpeg
-    logo&.blob&.filename = logo&.blob&.filename&.to_s&.gsub(/\.jfif\z/i, ".jpeg")
-    banner&.blob&.filename = banner&.blob&.filename&.to_s&.gsub(/\.jfif\z/i, ".jpeg")
   end
 end

test/models/hackathon_test.rb

@@ -73,7 +73,8 @@ class HackathonTest < ActiveSupport::TestCase
 
     assert @hackathon.save
 
-    assert_equal "assemble_logo.jpeg", @hackathon.logo.blob.filename.to_s
-    assert_equal "assemble.jpeg", @hackathon.banner.blob.filename.to_s
+    assert @hackathon.logo.variant(:small).processed
+    assert @hackathon.banner.variant(:small).processed
+    assert @hackathon.banner.variant(:large).processed
   end
 end