Remove stale Dr.Memory suppressions

tools/valgrind/drmemory/suppressions.txt

 # This file contains suppressions for the Dr.Memory tool, see
 # http://dev.chromium.org/developers/how-tos/using-drmemory
 #
 # This file contains suppressions for the DrMemory reports happening
 # in the 'light' mode (a.k.a. drmemory_light) as well as in the 'full' mode.
 # Please use suppressions_full.txt for all the reports that can happen only
 # in the full mode (drmemory_full),
 
 ############################
 # Known reports on the third party we have no control over.
@@ skipping 44 matching lines @@
 UNADDRESSABLE ACCESS
 name=http://code.google.com/p/drmemory/issues/detail?id=68 (UNADDR 1)
 ...
 MSWSOCK.dll!WSPStartup
 
 UNADDRESSABLE ACCESS
 name=http://code.google.com/p/drmemory/issues/detail?id=68 (UNADDR 2)
 ...
 ntdll.dll!RtlValidateUnicodeString
 
-UNADDRESSABLE ACCESS
-name=http://crbug.com/131304
-avutil-51.dll!ff_vector_fmul_sse
-
 ############################
 # TODO(timurrrr): investigate these
 UNADDRESSABLE ACCESS
 name=TODO SHParseDisplayName
 ...
 *!SHParseDisplayName
 
 UNADDRESSABLE ACCESS
 name=TODO GetCanonicalPathInfo
 ...
@@ skipping 155 matching lines @@
 WARNING
 name=prefetches in NVD3DUM.dll
 instruction=prefetch*
 NVD3DUM.dll!*
 
 WARNING
 name=prefetches in igdumd32.dll
 instruction=prefetch*
 igdumd32.dll!*
 
-# prefetch of unaddressable memory in ffmpeg
-WARNING
-name=http://crbug.com/134979 prefetches in ffmpeg
-instruction=prefetch*
-avcodec-*.dll!*
-
 UNADDRESSABLE ACCESS
 name=http://code.google.com/p/drmemory/issues/detail?id=582 bizarre cl-generated read-beyond-TOS
 instruction=mov    0xfffffffc(%esp) -> %eax
 chrome.dll!WebCore::RenderStyle::resetBorder*
 
 INVALID HEAP ARGUMENT
 name=http://crbug.com/101537
 *!scoped_ptr<_TOKEN_USER>*
 
 INVALID HEAP ARGUMENT
@@ skipping 133 matching lines @@
 content.dll!*
 content.dll!*
 *!*
 *!*
 *!*
 *!*
 *!*
 KERNEL32.dll!*
 ntdll.dll!*
 ntdll.dll!*