Removed unused distance field functions.

They are not needed anymore since 5971e091 and 184e27c0 have been
integrated.

Change-Id: Id611f1432a010f3c2af86951e1c79cb8fc73f9e4
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
QRawFont::fromFont does not get antialias setting from fontconfig

When creating a fontengine in QFontconfigDatabase::fontEngine we
solely base the antialias setting on the QFont StyleStrategy and forget
to ask fontconfig it has an overriding definition for this font match.

This patch will now let fontconfig decide the antialias setting unless the
NoAntialias stylestrategy has been set.

Change-Id: I67981582a37cfd3c59aa1db929095585af554088
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>