Remove CanAuthorWith trait (#12213)

* Remove CanAuthorWith trait

CanAuthotWith trait removed. Also all dependencies, parameters, type
paramers were removed. This is related to removal of native runtime.

* Remove commented code

* Fix code formatting

* trigger CI job

* trigger CI job

* trigger CI job

* trigger CI job

* trigger CI job

* trigger CI job

* trigger CI job

substrate/primitives/consensus/common/src/lib.rs

@@ -25,7 +25,6 @@ use std::{sync::Arc, time::Duration};
 
 use futures::prelude::*;
 use sp_runtime::{
-	generic::BlockId,
 	traits::{Block as BlockT, HashFor},
 	Digest,
 };
@@ -268,61 +267,3 @@ where
 		T::is_offline(self)
 	}
 }
-
-/// Checks if the current active native block authoring implementation can author with the runtime
-/// at the given block.
-pub trait CanAuthorWith<Block: BlockT> {
-	/// See trait docs for more information.
-	///
-	/// # Return
-	///
-	/// - Returns `Ok(())` when authoring is supported.
-	/// - Returns `Err(_)` when authoring is not supported.
-	fn can_author_with(&self, at: &BlockId<Block>) -> Result<(), String>;
-}
-
-/// Checks if the node can author blocks by using
-/// [`NativeVersion::can_author_with`](sp_version::NativeVersion::can_author_with).
-#[derive(Clone)]
-pub struct CanAuthorWithNativeVersion<T>(T);
-
-impl<T> CanAuthorWithNativeVersion<T> {
-	/// Creates a new instance of `Self`.
-	pub fn new(inner: T) -> Self {
-		Self(inner)
-	}
-}
-
-impl<T: sp_version::GetRuntimeVersionAt<Block> + sp_version::GetNativeVersion, Block: BlockT>
-	CanAuthorWith<Block> for CanAuthorWithNativeVersion<T>
-{
-	fn can_author_with(&self, at: &BlockId<Block>) -> Result<(), String> {
-		match self.0.runtime_version(at) {
-			Ok(version) => self.0.native_version().can_author_with(&version),
-			Err(e) => Err(format!(
-				"Failed to get runtime version at `{}` and will disable authoring. Error: {}",
-				at, e,
-			)),
-		}
-	}
-}
-
-/// Returns always `true` for `can_author_with`. This is useful for tests.
-#[derive(Clone)]
-pub struct AlwaysCanAuthor;
-
-impl<Block: BlockT> CanAuthorWith<Block> for AlwaysCanAuthor {
-	fn can_author_with(&self, _: &BlockId<Block>) -> Result<(), String> {
-		Ok(())
-	}
-}
-
-/// Never can author.
-#[derive(Clone)]
-pub struct NeverCanAuthor;
-
-impl<Block: BlockT> CanAuthorWith<Block> for NeverCanAuthor {
-	fn can_author_with(&self, _: &BlockId<Block>) -> Result<(), String> {
-		Err("Authoring is always disabled.".to_string())
-	}
-}