Fixes mapping processes not clearing up all flora (#55785)

Such as spawning ruins or generating terrain. This also makes so cleaned rocks properly dont drop ash, but have to be mined

code/game/objects/structures/flora.dm

@@ -409,11 +409,6 @@
 	. = ..()
 	icon_state = "[icon_state][rand(1,3)]"
 
-/obj/structure/flora/rock/Destroy()
-	if(mineResult && mineAmount)
-		new mineResult(loc, mineAmount)
-	. = ..()
-
 /obj/structure/flora/rock/attackby(obj/item/W, mob/user, params)
 	if(!mineResult || W.tool_behaviour != TOOL_MINING)
 		return ..()
@@ -422,6 +417,8 @@
 	to_chat(user, "<span class='notice'>You start mining...</span>")
 	if(W.use_tool(src, user, 40, volume=50))
 		to_chat(user, "<span class='notice'>You finish mining the rock.</span>")
+		if(mineResult && mineAmount)
+			new mineResult(loc, mineAmount)
 		SSblackbox.record_feedback("tally", "pick_used_mining", 1, W.type)
 		qdel(src)
 

code/modules/mapping/ruins.dm

@@ -32,7 +32,7 @@
 				qdel(nest)
 			for(var/mob/living/simple_animal/monster in T)
 				qdel(monster)
-			for(var/obj/structure/flora/ash/plant in T)
+			for(var/obj/structure/flora/plant in T)
 				qdel(plant)
 
 		load(central_turf,centered = TRUE)