Revert "Fix 'clean' task in gulpfile.js"
Revert "Fix 'clean' task in gulpfile.js"

Sykkro/penny-web,taranjeetsapra/polymer-starter-kit,vl4dt/polymer-starter-kit,gick/reveries-project,Ex-ante-Labs/shopper.ninja,SB-Technology-Holdings-International/WateringWebClient,yi-jiayu/mahjong-calculator-v2,RoyKoh/Project-3,Negashev/negash.ru,mtusk/polymer-starter-kit,markovuksanovic/polymer-starter-kit,gick/reveries-project,jeffposnick/polymer-starter-kit,vl4dt/polymer-starter-kit,Jelle-imitto/tools-polymer,SB-Technology-Holdings-International/WateringWebClient,sebs/cat-toy,trendystore/store,Jelle-imitto/tools-polymer,andrefuller/PolymerTrailerViewer,gick/reveries-project,gianluka79/First,hourliert/polymer-starter-kit,semafloor/semafloor-test-alpha,Ex-ante-Labs/pivot-ahead,FaellCarvalho/Geo-Location,egohub/appdesign,SB-Technology-Holdings-International/WateringWebClient,patilharshali/polymer-starter-kit,RoyKoh/Project-3,1001genomes/admixture-map,Sykkro/penny-web,bird1235456/polymer-starter-kit,ragingwind/polymer-starter-kit,SB-Technology-Holdings-International/Water,dennisg/luminis-colleagues,stephenzsy/charon-frontend,anusornc/polymer-starter-kit,anthonybrown/polymer-starter-kit,bird1235456/polymer-starter-kit,lordoftheflies/mlm-portal,robdodson/polymer-starter-kit,flaiker/polymer-starter-kit,lordoftheflies/mlm-portal,felixzapata/polymer-starter-kit,proplanr/polymer-starter-kit,semafloor/semafloor-test-alpha,proplanr/polymer-starter-kit,egohub/appdesign,felixzapata/polymer-starter-kit,JnJSW/dttdata,asternux/polymer-starter-kit,ragingwind/polymer-starter-kit,gertcuykens/polymer-starter-kit,stefanoantonel/ecofit,jdavidagudelo/polymerstarter,Jelle-imitto/tools-polymer,anthonybrown/polymer-starter-kit,taranjeetsapra/polymer-starter-kit,markovuksanovic/polymer-starter-kit,elenadatsiuk/tinkersolomid,mtusk/polymer-starter-kit,robdodson/polymer-starter-kit,FaellCarvalho/Geo-Location,stefanoantonel/brainpower,Serious-Rage/poligomy,WestchesterPublicLibrary/WPLreports,StartPolymer/polymer-starter-kit,GNURub/polymer-starter-kit,stefanoantonel/ecofit,grebett/polymer-starter-kit,1001genomes/admixture-map,gertcuykens/polymer-starter-kit,kristianmandrup/polymer-starter-kit,TheFinestArtist/HandbellChoir-Web,TheFinestArtist/HandbellChoir-Web,felixzapata/polymer-starter-kit,gick/mobile-polymer-starter-2,RoyKoh/Project-3,natabbotts/blogs.org.uk,m4h4n/polymer-starter-kit,stephenzsy/charon-frontend,gertcuykens/polymer-starter-kit,gick/mobile-polymer-starter-2,patilharshali/polymer-starter-kit,WestchesterPublicLibrary/WPLreports,klarkc/polymer-loopback-starter-kit,SB-Technology-Holdings-International/WateringWebClient,jeffposnick/polymer-starter-kit,Ex-ante-Labs/shopper.ninja,plusCubed/pluscubed-site,bdnorg/tmi,LM450N/polymer-starter-kit,JnJSW/dttdata,stefanoantonel/brainpower,datalink747/polymer-starter-kit,abdonrd/polymer-starter-kit,andrefuller/PolymerTrailerViewer,Ex-ante-Labs/pivot-ahead,grebett/polymer-starter-kit,WestchesterPublicLibrary/WPLreports,gianluka79/First,proplanr/polymer-starter-kit,sebs/cat-toy,m4h4n/polymer-starter-kit,LM450N/polymer-starter-kit,Jelle-imitto/tools-polymer,stefanoantonel/ecofit,bdnorg/tmi,michaetto/f16,alexpaluzzi/polymer-starter-kit,gick/mobile-polymer-starter-2,trendystore/store,victorgb6/id-questionary,michaetto/f16,grebett/polymer-starter-kit,Serious-Rage/poligomy,Jelle-imitto/tools-polymer,StartPolymer/polymer-starter-kit,trendystore/store,markovuksanovic/polymer-starter-kit,elenadatsiuk/tinkersolomid,StartPolymer/polymer-starter-kit-plus,michaetto/f16,tecla5/site,SB-Technology-Holdings-International/Water,ragingwind/polymer-starter-kit,jdavidagudelo/polymerstarter,natabbotts/blogs.org.uk,victorgb6/id-questionary,gianluka79/First,semafloor/semafloor-test-alpha,StartPolymer/polymer-starter-kit-plus,GNURub/polymer-starter-kit,SB-Technology-Holdings-International/Water,yi-jiayu/mahjong-calculator-v2,SB-Technology-Holdings-International/Water,LM450N/polymer-starter-kit,abdonrd/polymer-starter-kit,WestchesterPublicLibrary/WPLreports,alexpaluzzi/polymer-starter-kit,alexpaluzzi/polymer-starter-kit,hourliert/polymer-starter-kit,anusornc/polymer-starter-kit,kristianmandrup/polymer-starter-kit,SB-Technology-Holdings-International/Water,stephenzsy/charon-frontend,datalink747/polymer-starter-kit,klarkc/polymer-loopback-starter-kit,andrefuller/PolymerTrailerViewer,JnJSW/dttdata,flaiker/polymer-starter-kit,FaellCarvalho/Geo-Location,Serious-Rage/poligomy,Negashev/negash.ru,plusCubed/pluscubed-site,VandeurenGlenn/web-import,Sykkro/penny-web,dennisg/luminis-colleagues,klarkc/polymer-loopback-starter-kit,VandeurenGlenn/web-import,tecla5/site,lordoftheflies/mlm-portal,Negashev/negash.ru,asternux/polymer-starter-kit,victorgb6/id-questionary