[leak fixlet] Remove dead suppressions after leak fix in ProfileSyncServiceAutofillTest.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index dd51f073fab1985c839f7e026a8ee625fd26eadb..bf7ddc01021337d82825870599add8981bcb4a1e 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -1493,34 +1493,6 @@
    fun:sync_notifier::NonBlockingInvalidationNotifier::Core::UpdateCredentials
 }
 {
-   bug_117427_a
-   Heapcheck:Leak
-   fun:__gnu_cxx::new_allocator::allocate
-   fun:std::_Rb_tree::_M_get_node
-   fun:std::_Rb_tree::_M_create_node
-   fun:std::_Rb_tree::_M_insert_
-   fun:std::_Rb_tree::_M_insert_unique
-   fun:std::map::insert
-   fun:net::ExpiringCache::Put
-   fun:net::HostCache::Set
-   fun:net::HostResolverImpl::CacheResult
-   fun:net::HostResolverImpl::Job::CompleteRequests
-   fun:net::HostResolverImpl::Job::OnProcTaskComplete
-}
-{
-   bug_117427_b
-   Heapcheck:Leak
-   ...
-   fun:std::_Rb_tree::_M_create_node
-   fun:std::_Rb_tree::_M_insert_
-   fun:std::_Rb_tree::_M_insert_unique
-   fun:std::map::insert
-   fun:net::ExpiringCache::Put
-   fun:net::HostCache::Set
-   fun:net::MockHostResolverBase::ResolveProc
-   fun:net::MockHostResolverBase::ResolveNow
-}
-{
    bug_124758
    Heapcheck:Leak
    fun:sqlite3MemMalloc