discard the hack that worked around the deprecation warning
discard the hack that worked around the deprecation warning

(since the source-map module no longer uses require.js)

refs #9

butchi/codedecodeJS,rvanvelzen/UglifyJS2,istr/UglifyJS2,SpainTrain/UglifyJS2,lautis/UglifyJS2,eth-srl/UnuglifyJS,digitalloggers/UglifyJS2,dabretin/UglifyJS2,hxford/UglifyJS2,kemitchell/UglifyJS2,Spocdoc/uglify-js-fork,davidbau/UglifyJS2,TurkeyFried/uglifyjs2-dist,beni55/UnuglifyJS,githuboflee/first,hychen/UglifyJS2,shanaithal/UglifyJS2,VIVEKLUCKY1848/UglifyJS2,eth-srl/UnuglifyJS,jchbh-duplicate/UglifyJS2,sahat/UglifyJS2,supriyantomaftuh/UglifyJS2,GerHobbelt/UglifyJS2,charleslaw/RapydScript-Decompiler,sebmck/UglifyJS2,tomByrer/UglifyJS2,Venima/Test,HankMcCoy/UglifyJS2,beni55/UnuglifyJS,vjeux/UglifyJS2,TrigenSoftware/ColaScript,shelsonjava/UglifyJS2,microlv/UglifyJS2,avdg/UglifyJS2,Jeremy017/UglifyJS2,kittens/UglifyJS2,sielay/UglifyJS2,butchi/decodecodeJS