X-ray laser nerf - Falloff and Charge

See here for the main reasoning behind the PR -
https://nanotrasen.se/forum/topic/14790-wanted-unwanted-features-refactors-bugfixes-thread/

code/modules/projectiles/projectile/beams.dm

@@ -34,6 +34,7 @@
 	name = "xray beam"
 	icon_state = "xray"
 	damage = 15
+	tile_dropoff = 0.75
 	irradiate = 30
 	forcedodge = 1
 	range = 15

code/modules/projectiles/projectile/bullets.dm

@@ -69,17 +69,8 @@
 /obj/item/projectile/bullet/pellet
 	name = "pellet"
 	damage = 12.5
-	var/tile_dropoff = 0.75
-	var/tile_dropoff_s = 1.25
-
-/obj/item/projectile/bullet/pellet/Range()
-	..()
-	if(damage > 0)
-		damage -= tile_dropoff
-	if(stamina > 0)
-		stamina -= tile_dropoff_s
-	if(damage < 0 && stamina < 0)
-		qdel(src)
+	tile_dropoff = 0.75
+	tile_dropoff_s = 1.25
 
 /obj/item/projectile/bullet/pellet/rubber
 	name = "rubber pellet"