message: fixed: remove the useless code.
diff: dmc-datepicker.Datepicker
  .Datepicker__label(if="{ !!opts.label }") { opts.label }
  form.Datapicker__form(ref="form" onSubmit="{ handleFormSubmit }")
  - input.Datepicker__input(onTap="handleTap" ref="touch" value="{ opts.date }" placeholder="{ opts.placeholder || '' }" readonly="readonly" pattern="{ opts.pattern }" onInput="{ handleInputInput }" onChange="{ handleInputChange }")
  + input.Datepicker__input(onTap="handleTap" ref="touch" value="{ opts.date }" placeholder="{ opts.placeholder || '' }" readonly="readonly" onInput="{ handleInputInput }" onChange="{ handleInputChange }")
  .Datepicker__calendar(if="{ opts.isshown }")
  .Datapicker__head
  span.Datapicker__transition(onclick="{ handlePrevButtonPat }") &lt;
  