FIX Allow logo removal without file delete to allow docker binding to the file.

patches/uxupgrade_logo.patch

@@ -19,7 +19,16 @@
      LOGIN_DESKTOP_FILE  = 'login-2k.jpg'
      LOGIN_MOBILE_FILE   = 'login.jpg'
  
-@@ -153,10 +154,8 @@ module RedmineXUxUpgrade
+@@ -141,8 +142,6 @@ module RedmineXUxUpgrade
+       return unless old_attachment
+ 
+       if name == LOGO_NAME
+-        path_to_logo = image_path(name, old_attachment.disk_filename)
+-        File.delete(path_to_logo) if path_to_logo && File.exist?(path_to_logo)
+       else
+         FileUtils.cp_r(default_image_path(name), image_path(name))
+       end
+@@ -153,10 +152,8 @@ module RedmineXUxUpgrade
      # @param [String | nil] filename - name of the filename of the logo file
      # @return [String] - path to file corresponding to the given name
      def self.image_path(name, filename=nil)