Index: dns/Cargo.toml
--- dns/Cargo.toml.orig
+++ dns/Cargo.toml
@@ -13,11 +13,5 @@ log = "0.4"
 # protocol parsing
 byteorder = "1.3"
 
-# testing
-mutagen = { git = "https://github.com/llogiq/mutagen", optional = true }
-
 [dev-dependencies]
 pretty_assertions = "0.6"
-
-[features]
-with_mutagen = ["mutagen"]  # needs nightly
