From 088cd566ea87c90a9c765a113a2310d60849e7c1 Mon Sep 17 00:00:00 2001
From: Nick Cameron <ncameron@mozilla.com>
Date: Mon, 23 Mar 2015 15:50:32 +1300
Subject: [PATCH] Remove the UnusedCasts lint

---
 src/librustc_lint/builtin.rs | 24 ------------------------
 src/librustc_lint/lib.rs     |  1 -
 2 files changed, 25 deletions(-)

diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs
index ef82a465ef4..395460aca9f 100644
--- a/src/librustc_lint/builtin.rs
+++ b/src/librustc_lint/builtin.rs
@@ -84,30 +84,6 @@ impl LintPass for WhileTrue {
     }
 }
 
-declare_lint! {
-    UNUSED_TYPECASTS,
-    Allow,
-    "detects unnecessary type casts that can be removed"
-}
-
-#[derive(Copy)]
-pub struct UnusedCasts;
-
-impl LintPass for UnusedCasts {
-    fn get_lints(&self) -> LintArray {
-        lint_array!(UNUSED_TYPECASTS)
-    }
-
-    fn check_expr(&mut self, cx: &Context, e: &ast::Expr) {
-        if let ast::ExprCast(ref expr, ref ty) = e.node {
-            let t_t = ty::expr_ty(cx.tcx, e);
-            if ty::expr_ty(cx.tcx, &**expr) == t_t {
-                cx.span_lint(UNUSED_TYPECASTS, ty.span, "unnecessary type cast");
-            }
-        }
-    }
-}
-
 declare_lint! {
     UNSIGNED_NEGATION,
     Warn,
diff --git a/src/librustc_lint/lib.rs b/src/librustc_lint/lib.rs
index f2d2db18da4..e158541cd1c 100644
--- a/src/librustc_lint/lib.rs
+++ b/src/librustc_lint/lib.rs
@@ -89,7 +89,6 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
     add_builtin!(sess,
                  HardwiredLints,
                  WhileTrue,
-                 UnusedCasts,
                  ImproperCTypes,
                  BoxPointers,
                  UnusedAttributes,