Remove unused libprocessgroup dependency

Test: mmma system/gsid
Change-Id: Ifb98e8e3597091b5f765fae9d3a02018832d104a

Android.bp

diff --git a/Android.bp b/Android.bp
index 68260b6..ecc4e30 100644
--- a/Android.bp
+++ b/Android.bp
@@ -113,7 +113,6 @@
     target: {
         android: {
             shared_libs: [
-                "libprocessgroup",
                 "libvndksupport",
             ],
         },