Revert "[lldb-dap] Mark hidden frames as "subtle" (llvm#105457)"

This reverts commit 6f45602, which
depends on llvm#104523, which I'm
reverting.

(cherry picked from commit aa70f83)

Author: gribozavr

lldb/test/API/tools/lldb-dap/stackTrace/subtleFrames/Makefile

@@ -763,9 +763,6 @@ llvm::json::Value CreateStackFrame(lldb::SBFrame &frame) {
     object.try_emplace("instructionPointerReference", formatted_addr);
   }
 
-  if (frame.IsArtificial() || frame.IsHidden())
-    object.try_emplace("presentationHint", "subtle");
-
   return llvm::json::Value(std::move(object));
 }