Revert [Sanitizers] Add support for RISC-V 64-bit

This reverts r375132 (git commit 00bbe990c5d4472d5413479a539b3d6edbb3ca7a)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375136 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed