Minor simplification of DRD suppression file.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7521 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/glibc-2.X-drd.supp b/glibc-2.X-drd.supp
index 7cf5ce3..8652ad8 100644
--- a/glibc-2.X-drd.supp
+++ b/glibc-2.X-drd.supp
@@ -191,16 +191,6 @@
    pthread
    exp-drd:ConflictingAccess
    fun:__deallocate_stack
-   fun:__free_tcb
-   fun:start_thread
-   fun:clone
-}
-{
-   pthread stack_cache_lock
-   exp-drd:ConflictingAccess
-   fun:__deallocate_stack
-   fun:start_thread
-   fun:clone
 }
 {
    pthread