Remove src/commands/user_role.cc from Android.mk

Change-Id: I5b8873b6179d29605c25d334c708efa7dac5ed8b
Reviewed-on: https://weave-review.googlesource.com/1232
Reviewed-by: Alex Vakulenko <avakulenko@google.com>

libweave/Android.mk

diff --git a/libweave/Android.mk b/libweave/Android.mk
index ca81137..36732d3 100644
--- a/libweave/Android.mk
+++ b/libweave/Android.mk
@@ -90,7 +90,6 @@
 	src/commands/prop_values.cc \
 	src/commands/schema_constants.cc \
 	src/commands/schema_utils.cc \
-	src/commands/user_role.cc \
 	src/config.cc \
 	src/data_encoding.cc \
 	src/device_manager.cc \