remove unneeded weaken function (which was wrong anyway)

src/Term.idr

@@ -25,44 +25,3 @@ Show (Term n) where
   show (TPi  ty sc) = "TPi (" ++ show ty ++ ") (" ++ show sc ++ ")"
   show (TApp f x) = "TApp (" ++ show f ++ ") (" ++ show x ++ ")"
   show (TVar i _) = "TVar " ++ show i
-
-public export
-weaken : {p, q : _} -> LTE p q -> Term p -> Term q
-weaken _ TType    = TType
-weaken p (TLam sc) = TLam (weaken (LTESucc p) sc)
-weaken p (TPi  a  bx) = TPi (weaken p a) (weaken (LTESucc p) bx)
-weaken p (TApp f x)   = TApp (weaken p f)  (weaken p x)
-{-
-  Getting new index
-  =================
-
-    New index is 
-
-      old + Δctx
-
-    in this case
-
-      r + (q - p)
-
-    which since p <= q is equivalent to
-
-      (r + q) - p
-
-
-  Proving validity of new index
-  =============================
-
-              r < p           => (+mono)
-          r + q < p + q       => (-mono)
-    (r + q) - p < (p + q) - p => (lteTransp -+)
-    (r + q) - p < q           ∎
-
--}
-weaken {p = S p} {q = S q} (LTESucc p1) (TVar r p2' ) =
-  case p2' of 
-       LTESucc p2 => TVar (minus (r + q) p) 
-                          (LTESucc (lteTransp (minusLteMonotone (plusLteMonotoneRight q r p p2)) Refl (minusPlus p)))
-                          
-
-weaken1 : {n : _} -> Term n -> Term (S n)
-weaken1 = weaken lteS