Remove unused LLDB_ENABLE_LIBEDIT, LLVM_ENABLE_TERMINFO and PYTHON_EXECUTABLE llvm configure options

[mcbarton]

If you run

./emsdk install llvm-git-main-64bit

you get the following configure warnings

CMake Warning:
  Manually-specified variables were not used by the project:

    LLDB_ENABLE_LIBEDIT
    LLVM_ENABLE_TERMINFO
    PYTHON_EXECUTABLE

Therefore these options are note being used anymore in the llvm build and can be removed.

[sbc100]

It could be that these are needed when building older versions of LLVM? @juj?

[mcbarton]

@juj pinging for review

[sbc100]

@juj?

[juj]

Sorry, this fell through my queue in the past.

When I run CMake configure on

• Linux: http://clbri.com:8010/api/v2/logs/400522/raw_inline , or
• MacOS 26 Tahoe: http://clbri.com:8010/api/v2/logs/399680/raw_inline

I don't see CMake printing messages in those logs about those variables going unused.

LLDB_ENABLE_LIBEDIT cmdline config variable still exists here: https://github.com/llvm/llvm-project/blob/fbac55b82be9bf849d8a9c2514c01cb24a2a264f/lldb/cmake/modules/LLDBConfig.cmake#L60

and PYTHON_EXECUTABLE config variable still exists here: https://github.com/llvm/llvm-project/blob/fbac55b82be9bf849d8a9c2514c01cb24a2a264f/llvm/cmake/modules/CrossCompile.cmake#L86-L88

LLVM_ENABLE_TERMINFO might be unused, that I couldn't find in the LLVM repo anymore. That I think we could clean out.