Remove obsolete vdc call.

Since ca8e66a8b0f843812014a28d49208f9f6f64ecbc, init has
been handling reboots and filesystem unmounts. Remove obsolete
call to vdc.

Bug: 12504045
Change-Id: If8704ca042cb3a68857743b9973e48c52e7eb881
diff --git a/adb/adb.c b/adb/adb.c
index 41270f9..66e4953 100644
--- a/adb/adb.c
+++ b/adb/adb.c
@@ -1335,12 +1335,11 @@
         ** AID_NET_BT and AID_NET_BT_ADMIN to diagnose bluetooth (hcidump)
         ** AID_SDCARD_R to allow reading from the SD card
         ** AID_SDCARD_RW to allow writing to the SD card
-        ** AID_MOUNT to allow unmounting the SD card before rebooting
         ** AID_NET_BW_STATS to read out qtaguid statistics
         */
         gid_t groups[] = { AID_ADB, AID_LOG, AID_INPUT, AID_INET, AID_GRAPHICS,
                            AID_NET_BT, AID_NET_BT_ADMIN, AID_SDCARD_R, AID_SDCARD_RW,
-                           AID_MOUNT, AID_NET_BW_STATS };
+                           AID_NET_BW_STATS };
         if (setgroups(sizeof(groups)/sizeof(groups[0]), groups) != 0) {
             exit(1);
         }