Do not log every transient dependency when listing plugins

The code path in question is executed every time
rabbit_plugins:list/2 (e.g. rabbit_plugins:is_enabled/1)
is used, which with some distributed plugins can
happen once or several times a minute.

Given the maturity of the plugins subsystem, we
arguably can drop those messages.

(cherry picked from commit 30d78a4)

# Conflicts:
#	deps/rabbit/src/rabbit_plugins.erl

Author: michaelklishin

deps/rabbit/src/rabbit_plugins.erl

@@ -694,6 +694,7 @@ remove_plugins(Plugins) ->
               IsAPlugin =
               lists:member(Plugin, ActualPlugins) orelse
               lists:member(Name, PluginDeps),
+<<<<<<< HEAD
               if
                   IsOTPApp ->
                       rabbit_log:debug(
@@ -708,6 +709,8 @@ remove_plugins(Plugins) ->
                   true ->
                       ok
               end,
+=======
+>>>>>>> 30d78a490 (Do not log every transient dependency when listing plugins)
               not (IsOTPApp orelse not IsAPlugin)
       end, Plugins).