Revert "DWARF and unwind support for AOT assembly output."

runtime/vm/native_symbol_macos.cc

Index: runtime/vm/native_symbol_macos.cc
diff --git a/runtime/vm/native_symbol_macos.cc b/runtime/vm/native_symbol_macos.cc
index 6c6c4db46d3c4ea4e2bee225a363d0055b9719c7..1411f3f9caae20047946fc8aad3edcfe099d2a89 100644
--- a/runtime/vm/native_symbol_macos.cc
+++ b/runtime/vm/native_symbol_macos.cc
@@ -44,19 +44,6 @@ void NativeSymbolResolver::FreeSymbolName(char* name) {
 }
 
 
-bool NativeSymbolResolver::LookupSharedObject(uword pc,
-                                              uword* dso_base,
-                                              char** dso_name) {
-  Dl_info info;
-  int r = dladdr(reinterpret_cast<void*>(pc), &info);
-  if (r == 0) {
-    return false;
-  }
-  *dso_base = reinterpret_cast<uword>(info.dli_fbase);
-  *dso_name = strdup(info.dli_fname);
-  return true;
-}
-
 }  // namespace dart
 
 #endif  // defined(HOST_OS_MACOS)