Remove unused passport authenticate callback function
Remove unused passport authenticate callback function

xnum/hackmd,Yukaii/hackmd,Yukaii/hackmd,hackmdio/hackmd,ironhack/hackmd,Rory80Hz/hackmd,aswathyjacob8/newtest,Rwing/hackmd,hackmdio/hackmd,jccrofty30/hackmd,jccrofty30/hackmd,Rwing/hackmd,jccrofty30/hackmd,Yukaii/hackmd,aswathyjacob8/newtest,jackycute/HackMD,jackycute/HackMD,ironhack/hackmd,xnum/hackmd,hackmdio/hackmd,Rwing/hackmd,PeterDaveHello/hackmd,ironhack/hackmd,jackycute/HackMD,Rory80Hz/hackmd,PeterDaveHello/hackmd,xnum/hackmd,PeterDaveHello/hackmd,Rory80Hz/hackmd,aswathyjacob8/newtest