Removing valgrind suppression for bug 76370.

In addition to being unable to repro locally, the stack trace has been incorrect for a while and there are no reports from linux/mac valgrind bots.

BUG=76370
TBR=timurrr

Review URL: http://codereview.chromium.org/8923018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114130 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -1294,18 +1294,6 @@
    fun:-[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
    fun:-[NSView displayIfNeeded]
 }
-{
-   bug_76370
-   Memcheck:Unaddressable
-   fun:get_bits
-   ...
-   fun:read_huffman_tree
-   fun:theora_decode_tables
-   fun:theora_decode_init
-   fun:avcodec_open
-   fun:_ZN5media23FFmpegVideoDecodeEngine10InitializeEP11MessageLoopPNS_17VideoDecodeEngine12EventHandlerEPNS_18VideoDecodeContextERKNS_16VideoCodecConfigE
-   fun:_ZN5media18FFmpegVideoDecoder10InitializeEPNS_13DemuxerStreamEP14CallbackRunnerI6Tuple0EPS3_I6Tuple1IRKNS_18PipelineStatisticsEEE
-}
 {
    bug_77265_a
    Memcheck:Leak