librsvg: remove duplication in inherit

Since gnomebase class already inherits autotools and pkgconfig,
there is no need to repeat it here.

(From OE-Core rev: bae5ced6eba78f1903e15d7f9dd7afc3c06e8955)

Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-gnome/librsvg/librsvg_2.40.20.bb

@@ -12,7 +12,7 @@ SECTION = "x11/utils"
 DEPENDS = "cairo gdk-pixbuf glib-2.0 libcroco libxml2 pango"
 BBCLASSEXTEND = "native"
 
-inherit autotools pkgconfig gnomebase gtk-doc pixbufcache upstream-version-is-even gobject-introspection
+inherit gnomebase gtk-doc pixbufcache upstream-version-is-even gobject-introspection
 
 SRC_URI += "file://gtk-option.patch"