Remove fold1 implementation from Foldable1 instance (#23)

* Remove `fold1` implementation from Foldable1 instance

`fold1` is no longer a member of the Foldable1 class

* Update CI to v0.14.0-rc5

Author: JordanMartinez

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
 
       - uses: purescript-contrib/setup-purescript@main
         with:
-          purescript: "0.14.0-rc3"
+          purescript: "0.14.0-rc5"
 
       - uses: actions/setup-node@v1
         with:

src/Data/Identity.purs

@@ -87,7 +87,6 @@ instance foldableIdentity :: Foldable Identity where
   foldMap f (Identity x) = f x
 
 instance foldable1Identity :: Foldable1 Identity where
-  fold1 (Identity x) = x
   foldMap1 f (Identity x) = f x
   foldl1 _ (Identity x) = x
   foldr1 _ (Identity x) = x