Remove try_blocks feature flag

dalcde · dalcde · commit f1f6798557bf · 2021-02-27T13:45:31.000+08:00
We do not seem to use it
diff --git a/ext/crates/algebra/src/lib.rs b/ext/crates/algebra/src/lib.rs
@@ -1,6 +1,5 @@
 #![macro_use]
 #![feature(drain_filter)]
-#![feature(try_blocks)]
 
 #![allow(clippy::many_single_char_names)]
 #![allow(clippy::unreadable_literal)]
