Revert valgrind suppression added in r65660.

I don't see this on the ChromiumOS bots anymore.  I'm hoping it's either gone away, or it will turn a bot red quickly so I can analyze the problem.

BUG=62674
TEST=none

Review URL: http://codereview.chromium.org/5737006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69095 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -3285,22 +3285,6 @@
    ...
    fun:CERT_PKIXVerifyCert
 }
-{
-   bug_62674
-   Memcheck:Addr4
-   fun:_ZN3net25SingleRequestHostResolver6CancelEv
-   fun:_ZN3net25SingleRequestHostResolverD1Ev
-   fun:_ZN3net13TCPConnectJobD0Ev
-   fun:_Z26STLDeleteContainerPointersISt23_Rb_tree_const_iteratorIPN3net10ConnectJobEEEvT_S5_
-   fun:_Z17STLDeleteElementsISt3setIPN3net10ConnectJobESt4lessIS3_ESaIS3_EEEvPT_
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelper5Group13RemoveAllJobsEv
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelper20CancelAllConnectJobsEv
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelper5FlushEv
-   fun:_ZN3net8internal26ClientSocketPoolBaseHelperD1Ev
-   fun:_ZN3net20ClientSocketPoolBaseINS_15TCPSocketParamsEED1Ev
-   fun:_ZN3net19TCPClientSocketPoolD0Ev
-   fun:_ZN10scoped_ptrIN3net19TCPClientSocketPoolEED1Ev
-}
 {
    bug_63015
    Memcheck:Addr2