1 files changed, 7 insertions, 19 deletions
diff --git a/src/Data/Array/Nested/Internal/Shaped.hs b/src/Data/Array/Nested/Internal/Shaped.hs
index 4071aad..5d1b3b2 100644
--- a/src/Data/Array/Nested/Internal/Shaped.hs
+++ b/src/Data/Array/Nested/Internal/Shaped.hs
@@ -196,34 +196,22 @@ arithPromoteShaped2 :: forall sh a b c.
                     -> Shaped sh a -> Shaped sh b -> Shaped sh c
 arithPromoteShaped2 = coerce
 
--- | TODO: 'KnownShS' is only there for 'fromInteger'.
-instance (NumElt a, PrimElt a, Num a, KnownShS sh) => Num (Shaped sh a) where
+instance (NumElt a, PrimElt a, Num a) => Num (Shaped sh a) where
   (+) = arithPromoteShaped2 (+)
   (-) = arithPromoteShaped2 (-)
   (*) = arithPromoteShaped2 (*)
   negate = arithPromoteShaped negate
   abs = arithPromoteShaped abs
   signum = arithPromoteShaped signum
-  fromInteger =
-    case knownShS @sh of
-      ZSS -> sscalar . fromInteger
-      _ -> error "Data.Array.Nested.fromInteger: No singletons available, use explicit sreplicateScal"
-
--- | TODO: 'KnownShS' is only there for 'fromRational'.
-instance (FloatElt a, NumElt a, PrimElt a, Fractional a, KnownShS sh) => Fractional (Shaped sh a) where
-  fromRational =
-    case knownShS @sh of
-      ZSS -> sscalar . fromRational
-      _ -> error "Data.Array.Nested.fromRational: No singletons available, use explicit sreplicateScal"
+  fromInteger = error "Data.Array.Nested.fromInteger: No singletons available, use explicit sreplicateScal"
+
+instance (FloatElt a, NumElt a, PrimElt a, Fractional a) => Fractional (Shaped sh a) where
+  fromRational = error "Data.Array.Nested.fromRational: No singletons available, use explicit sreplicateScal"
   recip = arithPromoteShaped recip
   (/) = arithPromoteShaped2 (/)
 
--- | TODO: 'KnownShS' is only there for 'pi'.
-instance (FloatElt a, NumElt a, PrimElt a, Floating a, KnownShS sh) => Floating (Shaped sh a) where
-  pi =
-    case knownShS @sh of
-      ZSS -> sscalar pi
-      _ -> error "Data.Array.Nested.pi: No singletons available, use explicit sreplicateScal"
+instance (FloatElt a, NumElt a, PrimElt a, Floating a) => Floating (Shaped sh a) where
+  pi = error "Data.Array.Nested.pi: No singletons available, use explicit sreplicateScal"
   exp = arithPromoteShaped exp
   log = arithPromoteShaped log
   sqrt = arithPromoteShaped sqrt