Allow warnings (#2627)

substrate/core/consensus/babe/src/lib.rs

@@ -533,7 +533,6 @@ impl<B: Block, C, E, I, Error, SO> SlotWorker<B> for BabeWorker<C, E, I, SO> whe
 /// This digest item will always return `Some` when used with `as_babe_seal`.
 //
 // FIXME #1018 needs misbehavior types
-#[forbid(warnings)]
 fn check_header<B: Block + Sized, C: AuxStore>(
 	client: &Arc<C>,
 	slot_now: u64,

substrate/core/finality-grandpa/src/lib.rs

@@ -51,8 +51,6 @@
 //! number (this is num(signal) + N). When finalizing a block, we either apply
 //! or prune any signaled changes based on whether the signaling block is
 //! included in the newly-finalized chain.
-#![forbid(warnings)]
-#![allow(deprecated)] // FIXME #2532: remove once the refactor is done https://github.com/paritytech/substrate/issues/2532
 
 use futures::prelude::*;
 use log::{debug, info, warn};