Retire unused 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 # running overnight and removing outdated bugs/suppressions.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 1749 matching lines @@
    bug_145735
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN9__gnu_cxx13new_allocatorIcE8allocateEmPKv
    fun:_ZNSt12_Vector_baseIcSaIcEE11_M_allocateEm
    fun:_ZNSt12_Vector_baseIcSaIcEEC2EmRKS0_
    fun:_ZNSt6vectorIcSaIcEEC1EmRKcRKS0_
    fun:_ZN4base5files12_GLOBAL__N_121InotifyReaderCallbackEPNS1_13InotifyReaderEii
 }
 {
-   bug_146464
-   Memcheck:Leak
-   fun:realloc
-   fun:add_codeset.isra.10
-   ...
-   fun:XCreatePixmap
-   fun:XCreateBitmapFromData
-   ...
-   fun:_ZN4aura19RootWindowHostLinuxC1EPNS_22RootWindowHostDelegateERKN3gfx4RectE
-}
-{
    bug_146950
    Memcheck:Leak
    fun:malloc
    fun:get_peer_sock_name
    fun:_xcb_get_auth_info
    fun:xcb_connect_to_display_with_auth_info
    fun:_XConnectXCB
    fun:XOpenDisplay
    fun:_ZN4base18MessagePumpAuraX1118GetDefaultXDisplayEv
 }
@@ skipping 1823 matching lines @@
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE11_M_get_nodeEv
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE14_M_create_nodeIJS0_IiS6_EEEEPSt13_Rb_tree_nodeIS7_EDpOT_
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE10_M_insert_IS0_IiS6_EEESt17_Rb_tree_iteratorIS7_EPKSt18_Rb_tree_node_baseSK_OT_
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE16_M_insert_uniqueIS0_IiS6_EEES0_ISt17_Rb_tree_iteratorIS7_EbEOT_
    fun:_ZNSt3mapIi10linked_ptrIN4base19SequencedWorkerPool6WorkerEESt4lessIiESaISt4pairIKiS4_EEE6insertIS7_IiS4_EvEES7_ISt17_Rb_tree_iteratorIS9_EbEOT_
    fun:_ZN4base19SequencedWorkerPool5Inner10ThreadLoopEPNS0_6WorkerE
    fun:_ZN4base19SequencedWorkerPool6Worker3RunEv
    fun:_ZN4base12SimpleThread10ThreadMainEv
    fun:_ZN4base12_GLOBAL__N_110ThreadFuncEPv
 }