del device_bearpi_bearpi_hm_nano

Signed-off-by: NLaowang-BearPi <wangcheng@holdiot.com>

default.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <manifest>
   <remote fetch="." name="origin" review="https://openharmony.gitee.com/openharmony/"/>
-  <remote fetch="https://gitee.com/openharmony-sig" name="sig" review="https://gitee.com/openharmony-sig/"/>
   <default remote="origin" revision="OpenHarmony-3.1-Beta" sync-j="4" />
 
   <project name="miscservices_inputmethod" path="base/miscservices/inputmethod" />