From be02f74ea9f6ba641358322f140c697a8842e79b Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Fri, 28 Sep 2018 15:52:54 -0400
Subject: [PATCH] remove dead iterator code

---
 .../borrow_check/nll/region_infer/values.rs         | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/src/librustc_mir/borrow_check/nll/region_infer/values.rs b/src/librustc_mir/borrow_check/nll/region_infer/values.rs
index 3bd3cb2995b3..f9c1c11c62a0 100644
--- a/src/librustc_mir/borrow_check/nll/region_infer/values.rs
+++ b/src/librustc_mir/borrow_check/nll/region_infer/values.rs
@@ -252,19 +252,6 @@ impl PlaceholderIndices {
     }
 }
 
-impl ::std::iter::FromIterator<ty::Placeholder> for PlaceholderIndices {
-    fn from_iter<I>(iter: I) -> Self
-    where
-        I: IntoIterator<Item = ty::Placeholder>,
-    {
-        let mut result = Self::default();
-        iter.into_iter().for_each(|p| {
-            result.insert(p);
-        });
-        result
-    }
-}
-
 /// Stores the full values for a set of regions (in contrast to
 /// `LivenessValues`, which only stores those points in the where a
 /// region is live). The full value for a region may contain points in