Removed Frigg's Song from Group A Songs (fixes #1583)

* Song can now overlap with Group A and B Songs.
* Song was removed from group in Hero's Trail III patch.

src/map/status.c

@@ -8691,15 +8691,13 @@ int status_change_start(struct block_list* src, struct block_list* bl,enum sc_ty
 	case SC_MOONLITSERENADE:
 	case SC_RUSHWINDMILL:
 	case SC_ECHOSONG:
-	case SC_HARMONIZE:
-	case SC_FRIGG_SONG: // Group A doesn't overlap
+	case SC_HARMONIZE: // Group A doesn't overlap
 		if (type != SC_SWINGDANCE) status_change_end(bl, SC_SWINGDANCE, INVALID_TIMER);
 		if (type != SC_SYMPHONYOFLOVER) status_change_end(bl, SC_SYMPHONYOFLOVER, INVALID_TIMER);
 		if (type != SC_MOONLITSERENADE) status_change_end(bl, SC_MOONLITSERENADE, INVALID_TIMER);
 		if (type != SC_RUSHWINDMILL) status_change_end(bl, SC_RUSHWINDMILL, INVALID_TIMER);
 		if (type != SC_ECHOSONG) status_change_end(bl, SC_ECHOSONG, INVALID_TIMER);
 		if (type != SC_HARMONIZE) status_change_end(bl, SC_HARMONIZE, INVALID_TIMER);
-		if (type != SC_FRIGG_SONG) status_change_end(bl, SC_FRIGG_SONG, INVALID_TIMER);
 		break;
 	case SC_VOICEOFSIREN:
 	case SC_DEEPSLEEP: