Remove a valgrind suppression which isn't being used.
Remove a valgrind suppression which isn't being used.

This hasn't shown up on the buildbots during the past 40 cycles of:

   Chromium Mac (valgrind)
   Chromium Mac UI (valgrind)(1)
   Chromium Mac UI (valgrind)(2)
   Chromium Mac UI (valgrind)(3)
   Linux Tests (valgrind)(1)
   Linux Tests (valgrind)(2)
   Linux Tests (valgrind)(3)
   Linux Tests (valgrind)(4)
   Webkit Linux (valgrind)
   Webkit_Linux_(valgrind_layout)

BUG=22559

Review URL: http://codereview.chromium.org/264017

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@28466 0039d316-1c4b-4281-b951-d872f2087c98

ropik/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,adobe/chromium,adobe/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium