Revert "Clean code and add 'name' in theme.rb"

This reverts commit 608180646b.

app/models/design/theme.rb

@@ -1,15 +1,3 @@
 class Theme < Stylesheet
   embedded_in :design
-  field :name
-  
-  has_many :pages
-  
-  before_save :set_name
-  
-  protected
-  
-  def set_name
-    self.name = self.file_filename.split('.')[0]
-  end
-  
 end