Remove unused API (and some MIXBUS specifics)

libs/ardour/ardour/plugin_insert.h

@@ -118,8 +118,6 @@ public:
 	bool inplace () const { return ! _no_inplace; }
 
 	bool is_channelstrip () const;
-	bool is_nonbypassable () const;
-	bool show_on_ctrl_surface () const;
 
 	void set_input_map (uint32_t, ChanMapping);
 	void set_output_map (uint32_t, ChanMapping);

libs/ardour/luabindings.cc

@@ -1515,7 +1515,6 @@ LuaBindings::common (lua_State* L)
 		.addFunction ("signal_latency", &PluginInsert::signal_latency)
 		.addFunction ("get_count", &PluginInsert::get_count)
 		.addFunction ("is_channelstrip", &PluginInsert::is_channelstrip)
-		.addFunction ("is_nonbypassable", &PluginInsert::is_nonbypassable)
 		.addFunction ("clear_stats", &PluginInsert::clear_stats)
 		.addRefFunction ("get_stats", &PluginInsert::get_stats)
 		.endClass ()

libs/ardour/plugin_insert.cc

@@ -677,11 +677,6 @@ PluginInsert::activate ()
 void
 PluginInsert::deactivate ()
 {
-#ifdef MIXBUS
-	if (is_nonbypassable ()) {
-		return;
-	}
-#endif
 	_timing_stats.reset ();
 	Processor::deactivate ();
 
@@ -1590,30 +1585,7 @@ PluginInsert::has_midi_thru () const
 bool
 PluginInsert::is_channelstrip () const
 {
-#ifdef MIXBUS
-	return _plugins.front()->is_channelstrip();
-#else
 	return false;
-#endif
-}
-
-bool
-PluginInsert::is_nonbypassable () const
-{
-#ifdef MIXBUS
-	return _plugins.front()->is_nonbypassable ();
-#else
-	return false;
-#endif
-}
-
-bool
-PluginInsert::show_on_ctrl_surface () const
-{
-	if (is_channelstrip () || !is_nonbypassable ()) {
-		return false;
-	}
-	return true;
 }
 
 bool