packagegroup-self-hosted: Remove unused theme, use Adwaita icons

GTK+3 default theme is included in GTK+3. The corresponding GTK+2
theme would be in gnome-theme-adwaita, but the packagegroup does not
have GTK+2 apps anymore.

Also move icons to -graphics package.

(From OE-Core rev: b65a27988db84c475facdf5518909342b2042a3f)

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/packagegroups/packagegroup-self-hosted.bb

@@ -121,8 +121,6 @@ RDEPENDS_packagegroup-self-hosted-extended = "\
     groff \
     gzip \
     settings-daemon \
-    hicolor-icon-theme \
-    sato-icon-theme \
     libaio \
     libusb1 \
     libxml2 \
@@ -184,7 +182,7 @@ RDEPENDS_packagegroup-self-hosted-graphics = "\
     libsdl \
     libsdl-dev \
     libx11-dev \
-    gtk-theme-clearlooks \
+    adwaita-icon-theme \
     xdg-utils \
     epiphany \
     l3afpad \