Linux: remove unmaintained SELinux code.

sandbox/linux/services/libc_urandom_override.cc

Index: sandbox/linux/services/libc_urandom_override.cc
diff --git a/sandbox/linux/services/libc_urandom_override.cc b/sandbox/linux/services/libc_urandom_override.cc
index 3f9957222f922095281d4691039039f73a2bdb07..dfb4c269e3ffd10a14f425ceae1580474767372d 100644
--- a/sandbox/linux/services/libc_urandom_override.cc
+++ b/sandbox/linux/services/libc_urandom_override.cc
@@ -18,10 +18,6 @@
 
 namespace sandbox {
 
-// With SELinux we can carve out a precise sandbox, so we don't have to play
-// with intercepting libc calls.
-#if !defined(CHROMIUM_SELINUX)
-
 static bool g_override_urandom = false;
 
 void InitLibcUrandomOverrides() {
@@ -162,6 +158,4 @@ int xstat64_override(int version, const char *path, struct stat64 *buf) {
 
 #endif  // !ADDRESS_SANITIZER
 
-#endif  // !CHROMIUM_SELINUX
-
 }  // namespace content