Removal of OnPCStatCalcEvent (#4831)

* Fixes #4812.
* This script event can be replaced with the other various player script events.
* The trigger during equipment changing causes headache across other calculation events in source.

src/map/npc.cpp

@@ -4599,8 +4599,6 @@ const char *npc_get_script_event_name(int npce_index)
 		return script_config.kill_pc_event_name;
 	case NPCE_KILLNPC:
 		return script_config.kill_mob_event_name;
-	case NPCE_STATCALC:
-		return script_config.stat_calc_event_name;
 	default:
 		ShowError("npc_get_script_event_name: npce_index is outside the array limits: %d (max: %d).\n", npce_index, NPCE_MAX);
 		return NULL;