From 1fa4aa7047cb6855eaab5376e88c6d392864b833 Mon Sep 17 00:00:00 2001
From: "Alan M. Carroll" <amc@apache.org>
Date: Fri, 11 Dec 2020 14:10:44 -0600
Subject: [PATCH] Unused code: HostDBContinuation::removeEvent

---
 iocore/hostdb/HostDB.cc           | 73 -------------------------------
 iocore/hostdb/P_HostDBProcessor.h |  1 -
 2 files changed, 74 deletions(-)

diff --git a/iocore/hostdb/HostDB.cc b/iocore/hostdb/HostDB.cc
index 9ca0f4e4350..6589b211872 100644
--- a/iocore/hostdb/HostDB.cc
+++ b/iocore/hostdb/HostDB.cc
@@ -949,79 +949,6 @@ HostDBContinuation::setbyEvent(int /* event ATS_UNUSED */, Event * /* e ATS_UNUS
   return EVENT_DONE;
 }
 
-static bool
-remove_round_robin(HostDBInfo *r, const char *hostname, IpAddr const &ip)
-{
-  if (r) {
-    if (!r->round_robin) {
-      return false;
-    }
-    HostDBRoundRobin *rr = r->rr();
-    if (!rr) {
-      return false;
-    }
-    for (int i = 0; i < rr->good; i++) {
-      if (ip == rr->info(i).ip()) {
-        ip_text_buffer b;
-        Debug("hostdb", "Deleting %s from '%s' round robin DNS entry", ip.toString(b, sizeof b), hostname);
-        HostDBInfo tmp         = rr->info(i);
-        rr->info(i)            = rr->info(rr->good - 1);
-        rr->info(rr->good - 1) = tmp;
-        rr->good--;
-        if (rr->good <= 0) {
-          hostDB.refcountcache->erase(r->key);
-          return false;
-        } else {
-          if (is_debug_tag_set("hostdb")) {
-            int bufsize      = rr->good * INET6_ADDRSTRLEN;
-            char *rr_ip_list = static_cast<char *>(alloca(bufsize));
-            char *p          = rr_ip_list;
-            for (int n = 0; n < rr->good; ++n) {
-              ats_ip_ntop(rr->info(n).ip(), p, bufsize);
-              int nbytes = strlen(p);
-              p += nbytes;
-              bufsize -= nbytes;
-            }
-            Note("'%s' round robin DNS entry updated, entries=%d, IP list: %s", hostname, rr->good, rr_ip_list);
-          }
-        }
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
-int
-HostDBContinuation::removeEvent(int /* event ATS_UNUSED */, Event *e)
-{
-  Continuation *cont = action.continuation;
-  Ptr<ProxyMutex> proxy_mutex;
-  if (cont) {
-    proxy_mutex = cont->mutex;
-  }
-  WEAK_MUTEX_TRY_LOCK(lock, proxy_mutex, e->ethread);
-  if (!lock.is_locked()) {
-    e->schedule_in(HOST_DB_RETRY_PERIOD);
-    return EVENT_CONT;
-  }
-  if (!action.cancelled) {
-    if (!hostdb_enable) {
-      if (cont) {
-        cont->handleEvent(EVENT_HOST_DB_IP_REMOVED, (void *)nullptr);
-      }
-    } else {
-      Ptr<HostDBInfo> r = probe(mutex, hash, false);
-      bool res          = remove_round_robin(r.get(), hash.host_name, hash.ip);
-      if (cont) {
-        cont->handleEvent(EVENT_HOST_DB_IP_REMOVED, res ? static_cast<void *>(&hash.ip) : static_cast<void *>(nullptr));
-      }
-    }
-  }
-  hostdb_cont_free(this);
-  return EVENT_DONE;
-}
-
 // Lookup done, insert into the local table, return data to the
 // calling continuation.
 // NOTE: if "i" exists it means we already allocated the space etc, just return
diff --git a/iocore/hostdb/P_HostDBProcessor.h b/iocore/hostdb/P_HostDBProcessor.h
index a6a3998e150..1dbe1a5799b 100644
--- a/iocore/hostdb/P_HostDBProcessor.h
+++ b/iocore/hostdb/P_HostDBProcessor.h
@@ -459,7 +459,6 @@ struct HostDBContinuation : public Continuation {
   int dnsPendingEvent(int event, Event *e);
   int backgroundEvent(int event, Event *e);
   int retryEvent(int event, Event *e);
-  int removeEvent(int event, Event *e);
   int setbyEvent(int event, Event *e);
 
   /// Recompute the hash and update ancillary values.