Revert "Random Number Generator (llvm)"

This reverts commit cccba093090d127e0b6d17473b14c264c14c5259.

It causes build breakage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211146 91177308-0d34-0410-b5e6-96231b3b80d8