Drop useless check, it doesn't prevent from adding middleware later after app constructing
Drop useless check, it doesn't prevent from adding middleware later after app constructing

moden-py/aiohttp,AraHaanOrg/aiohttp,panda73111/aiohttp,KeepSafe/aiohttp,mind1master/aiohttp,z2v/aiohttp,KeepSafe/aiohttp,jettify/aiohttp,alex-eri/aiohttp-1,esaezgil/aiohttp,playpauseandstop/aiohttp,singulared/aiohttp,pfreixes/aiohttp,hellysmile/aiohttp,panda73111/aiohttp,esaezgil/aiohttp,rutsky/aiohttp,pfreixes/aiohttp,KeepSafe/aiohttp,esaezgil/aiohttp,z2v/aiohttp,juliatem/aiohttp,mind1master/aiohttp,Eyepea/aiohttp,arthurdarcet/aiohttp,panda73111/aiohttp,arthurdarcet/aiohttp,jettify/aiohttp,hellysmile/aiohttp,rutsky/aiohttp,rutsky/aiohttp,moden-py/aiohttp,mind1master/aiohttp,singulared/aiohttp,alex-eri/aiohttp-1,jettify/aiohttp,arthurdarcet/aiohttp,juliatem/aiohttp,AraHaanOrg/aiohttp,z2v/aiohttp,alex-eri/aiohttp-1,singulared/aiohttp,moden-py/aiohttp