bootstrap: remove unneeded extern crate

The crate itself is internally referenced by serde_derive.

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 55358f2ffcb7334deda2c7e4ecde1180cdd9c7d6..84a9e56b644c8cb2d2551b6463249aba745d14cf 100644 (file)
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -123,7 +123,6 @@
 extern crate serde_derive;
 #[macro_use]
 extern crate lazy_static;
-extern crate serde;
 extern crate serde_json;
 extern crate cmake;
 extern crate filetime;