remove mirah task rule for source backend
remove mirah task rule for source backend

KeenS/mirah,aspleenic/mirah,aspleenic/mirah,felixvf/mirah,felixvf/mirah,aspleenic/mirah,aspleenic/mirah,uujava/mirah,mirah/mirah,mirah/mirah,uujava/mirah,mirah/mirah,KeenS/mirah,uujava/mirah,uujava/mirah,mirah/mirah,felixvf/mirah,aspleenic/mirah,felixvf/mirah,KeenS/mirah,KeenS/mirah,uujava/mirah