Revert "vold: Enable the SO_PASSCRED socket option"

This reverts commit c51920c824.

NetlinkManager.cpp

@@ -50,7 +50,6 @@ NetlinkManager::~NetlinkManager() {
 int NetlinkManager::start() {
     struct sockaddr_nl nladdr;
     int sz = 64 * 1024;
-    int on = 1;
 
     memset(&nladdr, 0, sizeof(nladdr));
     nladdr.nl_family = AF_NETLINK;
@@ -64,12 +63,7 @@ int NetlinkManager::start() {
     }
 
     if (setsockopt(mSock, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)) < 0) {
-        SLOGE("Unable to set uevent socket SO_RECBUFFORCE option: %s", strerror(errno));
-        return -1;
-    }
-
-    if (setsockopt(mSock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) {
-        SLOGE("Unable to set uevent socket SO_PASSCRED option: %s", strerror(errno));
+        SLOGE("Unable to set uevent socket options: %s", strerror(errno));
         return -1;
     }