plugins/removeEditorsNSData: fix removing ns'ed element w/o attrs
plugins/removeEditorsNSData: fix removing ns'ed element w/o attrs

OrangeLV/svgo,PeterWangPo/svgo,pgherveou/svgo,ricardobeat/svgo,ennett50/svgo,svg/svgo,allypalanzi/svgo,WebTwist/svgo,subzey/svgo,jagan-veeraraghavan/svgo,akatopo/svgo,ben-eb/svgo,bORm/svgo,svg/svgo,pieter-lazzaro/svgo