add test: remove by Torrent object
add test: remove by Torrent object

ngjermundshaug/webtorrent,lucamaraschi/webtorrent,Stiveknx/webtorrent,akiva/webtorrent,joshterrill/webtorrent,sideffect0/webtorrent,arestov/webtorrent,nicola/webtorrent,karissa/webtorrent,MiracleBlue/webtorrent,webtorrent/webtorrent,yciabaud/webtorrent,karissa/webtorrent,jamesliu96/webtorrent,rozifus/webtorrent,whitef0x0/webtorrent,feross/webtorrent,serafinfernandez/webtorrent,ericwooley/webtorrent,loon3/webtorrent,webtorrent/webtorrent,loon3/webtorrent,adriagalin/webtorrent,fisch0920/webtorrent,feross/webtorrent,whitef0x0/webtorrent,rozifus/webtorrent,FabianFrancoRoldan/webtorrent,FabianFrancoRoldan/webtorrent,LinusU/webtorrent,jamesliu96/webtorrent,ericwooley/webtorrent,beni55/webtorrent,solderzzc/webtorrent,dan-hill/webtorrent,nicola/webtorrent,rom1504/webtorrent,serafinfernandez/webtorrent,solderzzc/webtorrent,Stiveknx/webtorrent,beni55/webtorrent,dan-hill/webtorrent,gillesdemey/webtorrent,fisch0920/webtorrent,madmarks/webtorrent,yciabaud/webtorrent,MiracleBlue/webtorrent,gillesdemey/webtorrent,LinusU/webtorrent,adriagalin/webtorrent,lucamaraschi/webtorrent,joshterrill/webtorrent,akiva/webtorrent,sideffect0/webtorrent,ngjermundshaug/webtorrent,madmarks/webtorrent