lxc: Enable under valgrind again

So we originally disabled LXC driver when libvirtd is running
under valgrind back in 05436ab7 (which dates to beginning of
2009) as it was causing valgrind to crash. It's not the case
anymore. Valgrind works with LXC happily.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

src/lxc/lxc_driver.c

@@ -1550,19 +1550,8 @@ static int lxcStateInitialize(bool privileged,
                               void *opaque ATTRIBUTE_UNUSED)
 {
     virCapsPtr caps = NULL;
-    const char *ld;
     virLXCDriverConfigPtr cfg = NULL;
 
-    /* Valgrind gets very annoyed when we clone containers, so
-     * disable LXC when under valgrind
-     * XXX remove this when valgrind is fixed
-     */
-    ld = virGetEnvBlockSUID("LD_PRELOAD");
-    if (ld && strstr(ld, "vgpreload")) {
-        VIR_INFO("Running under valgrind, disabling driver");
-        return 0;
-    }
-
     /* Check that the user is root, silently disable if not */
     if (!privileged) {
         VIR_INFO("Not running privileged, disabling driver");