remove unusued feature

the8472 · the8472 · commit d6fe73db3fea · 2023-04-10T13:13:09.000+02:00
diff --git a/clippy_lints/src/lib.rs b/clippy_lints/src/lib.rs
@@ -1,7 +1,6 @@
 #![feature(array_windows)]
 #![feature(binary_heap_into_iter_sorted)]
 #![feature(box_patterns)]
-#![feature(drain_filter)]
 #![feature(if_let_guard)]
 #![feature(iter_intersperse)]
 #![feature(let_chains)]
