Fix base64-encoded file uploads not being possible (#12748)

Fix #3804, Fix #5776

app/controllers/concerns/obfuscate_filename.rb

@@ -1,16 +0,0 @@
-# frozen_string_literal: true
-
-module ObfuscateFilename
-  extend ActiveSupport::Concern
-
-  class_methods do
-    def obfuscate_filename(path)
-      before_action do
-        file = params.dig(*path)
-        next if file.nil?
-
-        file.original_filename = SecureRandom.hex(8) + File.extname(file.original_filename)
-      end
-    end
-  end
-end