Revert "[lldb] [windows] Fix warning about unused static functions" (#188626)
Reverts llvm/llvm-project#188531.
That change broke some buildbots, e.g.
https://lab.llvm.org/buildbot/#/builders/141/builds/16639.
Even though one of the static functions, `GetPathToExecutable`, only was
used by the function `AddPythonDLLToSearchPath` below, it turns out that
`GetModulePath` is used in another place as well, guarded by a different
ifdef.