Remove unused memory suppression

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 3636 matching lines @@
    fun:_ZN9__gnu_cxx13new_allocatorIN3net18HttpRequestHeaders18HeaderKeyValuePairEE8allocateEjPKv
    fun:_ZNSt12_Vector_baseIN3net18HttpRequestHeaders18HeaderKeyValuePairESaIS2_EE11_M_allocateEj
    fun:_ZNSt6vectorIN3net18HttpRequestHeaders18HeaderKeyValuePairESaIS2_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS2_S4_EERKS2_
    fun:_ZNSt6vectorIN3net18HttpRequestHeaders18HeaderKeyValuePairESaIS2_EE9push_backERKS2_
    fun:_ZN3net18HttpRequestHeaders9SetHeaderERKN4base11StringPieceES4_
    fun:_ZN3net18HttpRequestHeaders19AddHeaderFromStringERKN4base11StringPieceE
    fun:_ZN3net18HttpRequestHeaders20AddHeadersFromStringERKN4base11StringPieceE
    fun:_ZN22ResourceDispatcherHost12BeginRequestEiRK23ResourceHostMsg_RequestPN3IPC7MessageEi
 }
 {
-   bug_96101a
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN3net16UploadDataStream6CreateEPNS_10UploadDataEPi
-   fun:_ZN3net22HttpNetworkTransaction14DoBuildRequestEv
-   fun:_ZN3net22HttpNetworkTransaction6DoLoopEi
-   fun:_ZN3net22HttpNetworkTransaction12OnIOCompleteEi
-   fun:_ZN3net22HttpNetworkTransaction13OnStreamReadyERKNS_9SSLConfigERKNS_9ProxyInfoEPNS_10HttpStreamE
-   fun:_ZN3net21HttpStreamFactoryImpl7Request13OnStreamReadyEPNS0_3JobERKNS_9SSLConfigERKNS_9ProxyInfoEPNS_10HttpStreamE
-   fun:_ZN3net21HttpStreamFactoryImpl3Job21OnStreamReadyCallbackEv
-}
-{
-   bug_96101b
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN3net22HttpNetworkTransaction14DoBuildRequestEv
-   fun:_ZN3net22HttpNetworkTransaction6DoLoopEi
-   fun:_ZN3net22HttpNetworkTransaction12OnIOCompleteEi
-   fun:_ZN3net22HttpNetworkTransaction13OnStreamReadyERKNS_9SSLConfigERKNS_9ProxyInfoEPNS_10HttpStreamE
-   fun:_ZN3net21HttpStreamFactoryImpl7Request13OnStreamReadyEPNS0_3JobERKNS_9SSLConfigERKNS_9ProxyInfoEPNS_10HttpStreamE
-   fun:_ZN3net21HttpStreamFactoryImpl3Job21OnStreamReadyCallbackEv
-}
-{
    bug_96103
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN9__gnu_cxx13new_allocatorIN3net11ProxyServerEE8allocateEjPKv
    fun:_ZNSt12_Vector_baseIN3net11ProxyServerESaIS1_EE11_M_allocateEj
    fun:_ZNSt12_Vector_baseIN3net11ProxyServerESaIS1_EEC2EjRKS2_
    fun:_ZNSt6vectorIN3net11ProxyServerESaIS1_EEC1ERKS3_
    fun:_ZN3net9ProxyListC1ERKS0_
    fun:_ZN3net9ProxyInfoC1ERKS0_
    fun:_ZN3net21HttpStreamFactoryImpl7Request18OnSpdySessionReadyEPNS0_3JobE13scoped_refptrINS_11SpdySessionEEb
@@ skipping 2168 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }