Remove obsolete Arel::Node#join?
Remove obsolete Arel::Node#join?

pxlpnk/rom,dcarral/rom,kwando/rom,dekz/rom,endash/rom,denyago/rom,pdswan/rom,rom-rb/rom,rom-rb/rom,vrish88/rom,cored/rom,jeremyf/rom,rom-rb/rom,Snuff/rom,pvcarrera/rom