Drop prefixes for linear-gradient
Drop prefixes for linear-gradient

Caniuse estimates this to be 94% widespread while the additional support
with the prefix is only ~0.75% more.


Former-commit-id: c0074dae7f59bcff8d5b8b1d0142f9aa454bc79f
brandur/sorg,brandur/sorg,brandur/sorg,brandur/sorg,brandur/sorg