Revert (2/3) "Add erlehmann fix to redstone world border crash"

This reverts commit b9d175e6a5.

mods/ITEMS/REDSTONE/mesecons/internal.lua

@@ -484,7 +484,11 @@ function mesecon.turnoff(pos, link)
 				local np = vector.add(f.pos, r)
 				local n = mesecon.get_node_force(np)
 
-				if not (mesecon.get_node_force(np) == nil) then
+				if not n then
+					mcl_explosions.explode(f.pos, 10)
+					return
+				end
+
 				if mesecon.is_receptor_on(n.name) then
 					local receptorrules = mesecon.receptor_get_rules(n)
 					for _, rr in pairs(receptorrules) do
@@ -493,7 +497,6 @@ function mesecon.turnoff(pos, link)
 						end
 					end
 				end
-				end
 				for _, l in ipairs(mesecon.rules_link_rule_all(f.pos, r)) do
 					local nlink = table.copy(l)
 					nlink.spread = false