Remove unneeded feature attribute from library

The extract_if feature has stabilised and no longer requires nightly.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 64c1666..3c9c28e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,3 @@
-#![feature(extract_if)]
 #![feature(io_error_more)]
 
 mod context;