Removes mining drill power mechanic.

- Removes the power mechanic from mining drills and the sonic
jackhammer.
- Fixes broken borg diamond drill upgrade.

code/modules/mining/mine_items.dm

@@ -74,94 +74,38 @@
 	name = "mining drill"
 	icon_state = "handdrill"
 	item_state = "jackhammer"
-	digspeed = 25 //available from roundstart, faster than a pickaxe but needs recharging or cell replacements
+	digspeed = 25 //available from roundstart, faster than a pickaxe.
 	digsound = list('sound/weapons/drill.ogg')
 	hitsound = 'sound/weapons/drill.ogg'
 	origin_tech = "materials=2;powerstorage=3;engineering=2"
 	desc = "An electric mining drill for the especially scrawny."
-	var/drillcost = 15 //666 mineral walls by default
-	var/obj/item/weapon/stock_parts/cell/high/bcell = null
-
-/obj/item/weapon/pickaxe/drill/New() //this one starts with a cell pre-installed.
-	..()
-	bcell = new(src)
-	return
-
-/obj/item/weapon/pickaxe/drill/update_icon()
-	if(!bcell)
-		icon_state = "[initial(icon_state)]-nocell"
-	else if(bcell.charge < drillcost)
-		icon_state = "[initial(icon_state)]-empty"
-	else
-		icon_state = "[initial(icon_state)]"
-
-/obj/item/weapon/pickaxe/drill/attackby(obj/item/weapon/W, mob/user)
-	if(istype(W, /obj/item/weapon/stock_parts/cell))
-		if(bcell)
-			user << "<span class='notice'>[src] already has a cell.</span>"
-		else
-			user.drop_item()
-			W.loc = src
-			bcell = W
-			user << "<span class='notice'>You install a cell in [src].</span>"
-			update_icon()
-	else
-		..()
-
-/obj/item/weapon/pickaxe/drill/attack_self(mob/user)
-	if(bcell)
-		bcell.updateicon()
-		bcell.loc = get_turf(src.loc)
-		bcell = null
-		user << "<span class='notice'>You remove the cell from [src].</span>"
-		update_icon()
-	else
-		user << "<span class='notice'>There is no cell in [src].</span>"
-
-/obj/item/weapon/pickaxe/drill/examine(mob/user)
-	..()
-	if(bcell)
-		user <<"<span class='notice'>The [src.name] is [round(bcell.percent())]% charged.</span>"
-	if(!bcell)
-		user <<"<span class='warning'>The [src.name] does not have a power source installed.</span>"
 
 /obj/item/weapon/pickaxe/drill/cyborg
 	name = "cyborg mining drill"
 	desc = "An integrated electric mining drill."
-	var/warned = 0
-
-/obj/item/weapon/pickaxe/drill/cyborg/attack_self(mob/user)
-	return //can't remove the drill's cell
-
-/obj/item/weapon/pickaxe/drill/cyborg/proc/use_robot_power(var/mob/living/silicon/robot/R)
-	if(!bcell.use(drillcost))
-		if(!warned)
-			usr << "<span class='danger'>Drill internal battery depleted, power will be drawn from user's power supply.</span>"
-			playsound(src, 'sound/weapons/smg_empty_alarm.ogg',50,1)
-			warned = 1
-		if(!R.cell.use(drillcost))
-			R << "<span class='warning'>You don't have enough charge to drill!</span>"
-			return 0
-	return 1
+	flags = NODROP
 
 /obj/item/weapon/pickaxe/drill/diamonddrill
 	name = "diamond-tipped mining drill"
 	icon_state = "diamonddrill"
-	digspeed = 10 //it's a fast drill with a relatively low power cost. what more could you ask for?
+	digspeed = 10
 	origin_tech = "materials=6;powerstorage=4;engineering=5"
 	desc = "Yours is the drill that will pierce the heavens!"
-	drillcost = 25 //400 mineral walls by default, but very quickly
+
+/obj/item/weapon/pickaxe/drill/cyborg/diamond //This is the BORG version!
+	name = "diamond-tipped cyborg mining drill" //To inherit the NODROP flag, and easier to change borg specific drill mechanics.
+	icon_state = "diamonddrill"
+	digspeed = 10
 
 /obj/item/weapon/pickaxe/drill/jackhammer
 	name = "sonic jackhammer"
 	icon_state = "jackhammer"
 	item_state = "jackhammer"
-	digspeed = 5 //the epitome of powertools. high power consumption, extremely fast mining, laughs at puny walls
+	digspeed = 5 //the epitome of powertools. extremely fast mining, laughs at puny walls
 	origin_tech = "materials=3;powerstorage=2;engineering=2"
 	digsound = list('sound/weapons/sonic_jackhammer.ogg')
 	hitsound = 'sound/weapons/sonic_jackhammer.ogg'
 	desc = "Cracks rocks with sonic blasts, and doubles as a demolition power tool for smashing walls."
-	drillcost = 30 //333 mineral walls by default, but very quickly
 
 /*****************************Shovel********************************/
 

code/modules/mining/mine_turfs.dm

@@ -414,16 +414,6 @@
 		if (!( istype(T, /turf) ))
 			return
 
-		if(istype(P, /obj/item/weapon/pickaxe/drill))
-			var/obj/item/weapon/pickaxe/drill/D = P
-			if(isrobot(user))
-				var/obj/item/weapon/pickaxe/drill/cyborg/RD = D
-				if(!RD.use_robot_power(user))
-					return
-			else if(!D.bcell.use(D.drillcost))
-				user << "<span class='warning'>Your [D.name] doesn't have enough charge!</span>"
-				return
-
 		if(last_act+P.digspeed > world.time)//prevents message spam
 			return
 		last_act = world.time

code/modules/research/designs.dm

@@ -171,7 +171,7 @@ datum/design/proc/CalcReliability(var/list/temp_techs)
 
 /datum/design/jackhammer
 	name = "Sonic Jackhammer"
-	desc = "Essentially a handheld planet-cracker. Can drill through walls with ease as well, but has high power cost for doing so."
+	desc = "Essentially a handheld planet-cracker. Can drill through walls with ease as well."
 	id = "jackhammer"
 	req_tech = list("materials" = 6, "powerstorage" = 6, "engineering" = 5, "magnets" = 6)
 	build_type = PROTOLATHE