Revert "Add support for gid derivation on private volumes"

This reverts commit 1b38e330035833971663eeb5bccfa16e4ffc1e72.

Causes a boot loop on bullhead.

(cherry picked from commit a3a60b372efb48a672848c7797efd57a4ec92303)

Bug: 63245673
Bug: 65660058
Test: m
Merged-In: I9c8afd3ba22547aff5aff06b71cb8ff3b8a07350
Change-Id: I9c8afd3ba22547aff5aff06b71cb8ff3b8a07350
diff --git a/EmulatedVolume.cpp b/EmulatedVolume.cpp
index eb1add8..44ad22a 100644
--- a/EmulatedVolume.cpp
+++ b/EmulatedVolume.cpp
@@ -84,7 +84,6 @@
                 "-g", "1023", // AID_MEDIA_RW
                 "-m",
                 "-w",
-                "-G",
                 mRawPath.c_str(),
                 label.c_str(),
                 NULL)) {