remove section about upstream mentors from teamproposal.html (I suspect it was left over from HFOSS)
remove section about upstream mentors from teamproposal.html (I suspect it was left over from HFOSS)

decause/bizlegfoss,amm4108/bizlegfoss,brendanwhitfield/bizlegfoss,brendanwhitfield/bizlegfoss,Nolski/bizlegfoss,liam-middlebrook/bizlegfoss,decause/bizlegfoss,liam-middlebrook/bizlegfoss