Revert "Fix an authentication bypass bug in SMP"

This reverts commit bac3e50f.

Reason for revert: b/331855635
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:34ee990ee72693cd534d7d696f3a52c9c5a5bfd8)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e214741ee05dd6bad9bf1d7a62c1448c7eee4332)
Merged-In: I471269cb5ecd4aef32c6648ad575baea44b562d1
Change-Id: I471269cb5ecd4aef32c6648ad575baea44b562d1

system/stack/smp/smp_act.cc

@@ -1977,14 +1977,6 @@ void smp_process_secure_connection_oob_data(tSMP_CB* p_cb,
 
   if (!p_sc_oob_data->peer_oob_data.present) {
     log::verbose("peer OOB data is absent");
-
-    if (IS_FLAG_ENABLED(fix_le_oob_pairing_bypass)) {
-      tSMP_INT_DATA smp_int_data{};
-      smp_int_data.status = SMP_OOB_FAIL;
-      smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &smp_int_data);
-      return;
-    }
-
     p_cb->peer_random = {0};
   } else {
     p_cb->peer_random = p_sc_oob_data->peer_oob_data.randomizer;