libdebuggerd: delete unused code.

Test: none
Change-Id: I87b62f306d287e9356c639f6d0c49566c71f7f29
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index c1a59d8..ca68212 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -592,7 +592,6 @@
   }
 
   ProcessInfo process_info;
-  unique_fd attr_fd(open("/proc/self/attr/current", O_RDONLY | O_CLOEXEC));
   process_info.abort_msg_address = abort_msg_address;
   engrave_tombstone(unique_fd(dup(tombstone_fd)), unique_fd(dup(proto_fd)), &unwinder, threads, tid,
                     process_info, nullptr, nullptr);