Remove suppressions related to App Notifications

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 # running overnight and removing outdated bugs/suppressions.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 3554 matching lines @@
    fun:_ZN44WebDragDestGtkTest_NoTabContentsWrapper_Test8TestBodyEv
 }
 {
    bug_98867
    Memcheck:Jump
    obj:*
    obj:*
    obj:*
 }
 {
-   bug_99166
-   Memcheck:Leak
-   ...
-   fun:_ZN22AppNotificationStorage6CreateE*
-}
-{
    bug_99304
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:_ZN2v88internal10PagedSpace11AllocateRawEi
    fun:_ZN2v88internal12Deserializer8AllocateEiPNS0_5SpaceEi
    fun:_ZN2v88internal12Deserializer10ReadObjectEiPNS0_5SpaceEPPNS0_6ObjectE
    fun:_ZN2v88internal12Deserializer9ReadChunkEPPNS0_6ObjectES4_iPh
    fun:_ZN2v88internal12Deserializer10ReadObjectEiPNS0_5SpaceEPPNS0_6ObjectE
    fun:_ZN2v88internal12Deserializer9ReadChunkEPPNS0_6ObjectES4_iPh
@@ skipping 3264 matching lines @@
    bug_195160_c
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
    fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
    fun:_ZN4base26PostTaskAndReplyWithResultI10scoped_ptrIN20ManagedModeURLFilter8ContentsENS_14DefaultDeleterIS3_EEES6_EEbPNS_10TaskRunnerERKN15tracked_objects8LocationERKNS_8CallbackIFT_vEEERKNSD_IFvT0_EEE
    fun:_ZN20ManagedModeURLFilter14LoadWhitelistsE12ScopedVectorI19ManagedModeSiteListE
 }