[llvm] [bazel] Clean up unused exported files (PR #114620)

[Pranav Kant via llvm-commits]

pranavk wrote:

This is causing problems in bazel build:

ERROR: /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/3f9470ef82c49ef29515926500bf249a/external/llvm-project/lldb/BUILD.bazel:196:8: in genrule rule @@llvm-project//lldb:lldb-sbapi-dwarf-enums: target '@@llvm-project//llvm:include/llvm/BinaryFormat/Dwarf.def' is not visible from target '@@llvm-project//lldb:lldb-sbapi-dwarf-enums'. Check the visibility declaration of the former target if you think the dependency is legitimate. To set the visibility of that source file target, use the exports_files() function

https://github.com/llvm/llvm-project/pull/114620