Math: remove now redundant Color test case.
Math: remove now redundant Color test case.

At some point before the default Color constructor was different from
the ZeroInit one. Not anymore.

MiUishadow/magnum,MiUishadow/magnum,MiUishadow/magnum,MiUishadow/magnum,MiUishadow/magnum,MiUishadow/magnum