Remove unnecessary core-oj library

core-oj is part of the default java libraries and should not be
explicitly included by a package.

Test: m -j checkbuild
Change-Id: Idccd326ebbbfb9121ce556037e79c173bfd08580
diff --git a/Android.mk b/Android.mk
index 349b79c..cafe3bf 100644
--- a/Android.mk
+++ b/Android.mk
@@ -29,7 +29,6 @@
 
 LOCAL_JAVA_LIBRARIES := \
     bouncycastle \
-    core-oj \
     telephony-common \
     ims-common