cmake-native: Drop unneeded staging function and use do_install

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/packages/cmake/cmake-native_2.6.0.bb

@@ -1,12 +1,3 @@
 CMAKE_MAJOR_VERSION="2.6"
 inherit native
 require cmake.inc
-
-do_stage() {
-    oe_runmake install
-    autotools_stage_all
-}
-
-do_install() {
-	:
-}