Don't hide tags with PrettyPrinterHideTagFilter

Users should rather use %k in list_format if they want to avoid hidden
tags on the output.

topydo/commands/ListCommand.py

@@ -18,7 +18,6 @@ from topydo.lib.Config import config
 from topydo.lib.ExpressionCommand import ExpressionCommand
 from topydo.lib.PrettyPrinter import pretty_printer_factory
 from topydo.lib.PrettyPrinterFilter import (PrettyPrinterAlignFilter,
-                                            PrettyPrinterHideTagFilter,
                                             PrettyPrinterIndentFilter,
                                             PrettyPrinterFormatFilter)
 
@@ -95,7 +94,6 @@ class ListCommand(ExpressionCommand):
                            self.format))
             filters.append(PrettyPrinterAlignFilter())
             filters.append(PrettyPrinterIndentFilter(indent))
-            filters.append(PrettyPrinterHideTagFilter(hidden_tags))
 
             self.printer = pretty_printer_factory(self.todolist, filters)