Remove leftover question from JavaScript Lingo challenge
Remove leftover question from JavaScript Lingo challenge

This commit :
1. Removes the leftover question from the JavaScript Lingo challenge
2. Fixes a warning in the Travis CI build.

Tested locally.

HKuz/FreeCodeCamp,no-stack-dub-sack/freeCodeCamp,tmashuang/FreeCodeCamp,pahosler/freecodecamp,Munsterberg/freecodecamp,Munsterberg/freecodecamp,jonathanihm/freeCodeCamp,matthew-t-smith/freeCodeCamp,systimotic/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,1111113j8Pussy420/https-github.com-raisedadead-freeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCampQuito/FreeCodeCamp,BerkeleyTrue/FreeCodeCamp,sakthik26/FreeCodeCamp,BrendanSweeny/FreeCodeCamp,BrendanSweeny/FreeCodeCamp,TheeMattOliver/FreeCodeCamp,codeman869/FreeCodeCamp,otavioarc/freeCodeCamp,sakthik26/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,raisedadead/FreeCodeCamp,DusanSacha/FreeCodeCamp,codeman869/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,FreeCodeCampQuito/FreeCodeCamp,TheeMattOliver/FreeCodeCamp,HKuz/FreeCodeCamp,no-stack-dub-sack/freeCodeCamp,DusanSacha/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,1111113j8Pussy420/https-github.com-raisedadead-freeCodeCamp,MiloATH/FreeCodeCamp,techstonia/FreeCodeCamp,techstonia/FreeCodeCamp,systimotic/FreeCodeCamp,jonathanihm/freeCodeCamp,BhaveshSGupta/FreeCodeCamp,matthew-t-smith/freeCodeCamp,MiloATH/FreeCodeCamp,pahosler/freecodecamp,BerkeleyTrue/FreeCodeCamp,otavioarc/freeCodeCamp,tmashuang/FreeCodeCamp