Remove check for Twisted>=15.0.0
Remove check for Twisted>=15.0.0

16.0.0 is currently the minimum supported version

pawelmhm/scrapy,wujuguang/scrapy,eLRuLL/scrapy,eLRuLL/scrapy,pawelmhm/scrapy,wujuguang/scrapy,pawelmhm/scrapy,dangra/scrapy,finfish/scrapy,eLRuLL/scrapy,pablohoffman/scrapy,elacuesta/scrapy,starrify/scrapy,finfish/scrapy,elacuesta/scrapy,starrify/scrapy,pablohoffman/scrapy,scrapy/scrapy,wujuguang/scrapy,pablohoffman/scrapy,starrify/scrapy,scrapy/scrapy,dangra/scrapy,dangra/scrapy,scrapy/scrapy,finfish/scrapy,elacuesta/scrapy