[llvm-stress] Remove Rand32 helper function

To try and help avoid repeats of PR32585, remove Rand32 which is only called by Rand64


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306285 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed