Remove unnecessary case annotations

Author: josevalim

lib/elixir/lib/kernel.ex

@@ -4230,18 +4230,15 @@ defmodule Kernel do
   defmacro left && right do
     assert_no_match_or_guard_scope(__CALLER__.context, "&&")
 
-    annotate_case(
-      [type_check: :expr],
-      quote do
-        case unquote(left) do
-          x when :"Elixir.Kernel".in(x, [false, nil]) ->
-            x
+    quote do
+      case unquote(left) do
+        x when :"Elixir.Kernel".in(x, [false, nil]) ->
+          x
 
-          _ ->
-            unquote(right)
-        end
+        _ ->
+          unquote(right)
       end
-    )
+    end
   end
 
   @doc """
@@ -4273,18 +4270,15 @@ defmodule Kernel do
   defmacro left || right do
     assert_no_match_or_guard_scope(__CALLER__.context, "||")
 
-    annotate_case(
-      [type_check: :expr],
-      quote do
-        case unquote(left) do
-          x when :"Elixir.Kernel".in(x, [false, nil]) ->
-            unquote(right)
+    quote do
+      case unquote(left) do
+        x when :"Elixir.Kernel".in(x, [false, nil]) ->
+          unquote(right)
 
-          x ->
-            x
-        end
+        x ->
+          x
       end
-    )
+    end
   end
 
   @doc """