chore: terrain no longer updates at runtime (only editor)

modules/terrain/terrain.cpp

@@ -1,4 +1,5 @@
 #include "terrain.h"
+#include "core/config/engine.h"
 #include "terrain/terrain_chunk.h"
 #include "terrain/terrain_modifier.h"
 
@@ -116,6 +117,9 @@ void Terrain::synchronous_generate_terrain() {
 }
 
 void Terrain::_notification(int what) {
+	if (!Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
 	switch (what) {
 		default:
 			return;