[clang] [clang-tools-extra] [flang] [lld] [llvm] [LLVM][utils] Add script which clears release notes (PR #153593)

[Nikita Popov via cfe-commits]

nikic wrote:

@tru In that case it might make sense to switch to the libcxx model where all the release notes are versioned (see https://github.com/llvm/llvm-project/tree/main/libcxx/docs/ReleaseNotes) and then just the latest one included on the unversioned page?


https://github.com/llvm/llvm-project/pull/153593