Remove unused feature gate from librustc_incremental

bjorn3 · bjorn3 · commit d252791a93b7 · 2020-02-07T13:58:50.000+01:00
diff --git a/src/librustc_incremental/lib.rs b/src/librustc_incremental/lib.rs
@@ -3,7 +3,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
-#![feature(specialization)]
 #![recursion_limit = "256"]
 
 #[macro_use]
