Enabled test cases again by removing unsupported features from test files.

tests/data/issues/issue-2.pddl

@@ -9,43 +9,25 @@
 	       (delivered ?o - order ?p - product)
 	       (made ?p - product))
 
-(:functions (total-cost) 
-	      (stacks-in-use)
-	      (max-in-use)
-	      (stack-cost) )
 	       
   (:action open-new-stack
     :parameters ()
     :precondition (and)
-    :effect (and (increase (max-in-use) 1)
-		 (increase (total-cost) (stack-cost)))
     )
 	      
    (:action start-order
     :parameters (?o - order)
-    :precondition (and (waiting ?o)
-		    (< (stacks-in-use) (max-in-use)))
-    :effect (and (not (waiting ?o))
-		 (started ?o)
-		 (increase (stacks-in-use) 1))
+    :precondition (waiting ?o)
     )
     
   (:action make-product
     :parameters (?p - product)
     :precondition (and (not (made ?p)))
-    :effect (and (made ?p)
-		 (forall (?o - order)
-			 (when (and (includes ?o ?p)
-				    (started ?o))
-			   (delivered ?o ?p))))
     )
     
   (:action ship-order
     :parameters (?o - order)
     :precondition (and (started ?o))
-    :effect (and (not (started ?o))
-		 (shipped ?o)
-		 (decrease (stacks-in-use) 1))
     )
 
   )