manifest: Remove staging-galaxynexus.xml

We can now create a working Galaxy Nexus build from the unified
manifest - the separate one is no longer necessary.

Change-Id: I378b196d974e3507b7fb50a2996e8edc8904bce9
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
1 file changed