remove generated shades css classes, issue #3043
remove generated shades css classes, issue #3043

INGCRENGIFO/materialize,philipraets/materialize,josecarlosweb/materialize,zhenhua32/materialize,ra-tes/style-guide,DonHartman/materialize,zhenhua32/materialize,Dogfalo/materialize,poetic/materialize,ManuZiD/materialize,ManuZiD/materialize,ccloli/materialize,mihaibogdan10/materialize,rlugojr/materialize,ra-tes/style-guide,hustcer/materialize,INGCRENGIFO/materialize,ZiperRom1/materialize,tangposmarvin/materialize,NicolasAndersen/materialize,mihaibogdan10/materialize,devgrok/materialize,NicolasAndersen/materialize,ccloli/materialize,ZiperRom1/materialize,digitalkaoz/materialize,hustcer/materialize,Dogfalo/materialize,josecarlosweb/materialize,gokuldh/materialize,gokuldh/materialize,digitalkaoz/materialize,poetic/meteor-materialize-scss,philipraets/materialize,DonHartman/materialize,tomscholz/materialize,poetic/meteor-materialize-scss,poetic/materialize,rlugojr/materialize,tangposmarvin/materialize,devgrok/materialize,tomscholz/materialize