From f61151a726b19c1a325b21c4b879b612450d270d Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Mon, 23 Oct 2017 14:05:58 -0700
Subject: [PATCH] Revert diagnostics code from
 12515374597604499d77e4d9da61821f1801a240

---
 components/style/custom_properties.rs | 2 --
 1 file changed, 2 deletions(-)

diff --git a/components/style/custom_properties.rs b/components/style/custom_properties.rs
index 116899828b6..c0a540e5b17 100644
--- a/components/style/custom_properties.rs
+++ b/components/style/custom_properties.rs
@@ -168,13 +168,11 @@ where
             return;
         }
         self.index.retain(|key| !set.contains(key));
-        self.values.begin_mutation();
         // XXX It may be better to use retain when we back to use a
         // normal hashmap rather than DiagnosticHashMap.
         for key in set.iter() {
             self.values.remove(key);
         }
-        self.values.end_mutation();
         debug_assert_eq!(self.values.len(), self.index.len());
     }
 }