Revert "[15/15][Clang][RISCV][NFC] Set data member under Policy as constants"
This reverts commit
2b807336ad385e64a7d182d5fb67bdfe449707a3.
This change is causing Windows builds to hang and out of memory errors with clang-15:
- https://lab.llvm.org/buildbot/#/builders/17/builds/33129
- https://lab.llvm.org/buildbot/#/builders/174/builds/17069
- https://lab.llvm.org/buildbot/#/builders/83/builds/28484
- https://lab.llvm.org/buildbot/#/builders/172/builds/22803
- https://lab.llvm.org/buildbot/#/builders/216/builds/16210