vexpress: Don't use custom init.rc

Use system/core/rootdir/init.rc like the other boards - no
need to maintain several versions of the file

Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
diff --git a/device.mk b/device.mk
index c179f93..92fa453 100644
--- a/device.mk
+++ b/device.mk
@@ -3,7 +3,6 @@
     device/linaro/vexpress_a9/egl.cfg:system/lib/egl/egl.cfg
 
 PRODUCT_COPY_FILES += \
-    system/core/rootdir/init.rc:root/init.rc \
     device/linaro/vexpress_a9/init.arm-versatileexpress.rc:root/init.arm-versatileexpress.rc \
     device/linaro/vexpress_a9/init.vexpress_a9.sh:system/etc/init.vexpress_a9.sh \
     device/linaro/vexpress_a9/initlogo.rle:root/initlogo.rle