Fix clippy warnings in generated runtime api code (#5874)

substrate/primitives/api/proc-macro/src/impl_runtime_apis.rs

@@ -173,7 +173,7 @@ fn generate_wasm_interface(impls: &[ItemImpl]) -> Result<TokenStream> {
 				#( #attrs )*
 				#[cfg(not(feature = "std"))]
 				#[no_mangle]
-				pub fn #fn_name(input_data: *mut u8, input_len: usize) -> u64 {
+				pub unsafe fn #fn_name(input_data: *mut u8, input_len: usize) -> u64 {
 					let mut #input = if input_len == 0 {
 						&[0u8; 0]
 					} else {

substrate/primitives/runtime/src/traits.rs

@@ -715,7 +715,7 @@ pub trait SignedExtension: Codec + Debug + Sync + Send + Clone + Eq + PartialEq
 		info: &DispatchInfoOf<Self::Call>,
 		len: usize,
 	) -> Result<Self::Pre, TransactionValidityError> {
-		self.validate(who, call, info.clone(), len)
+		self.validate(who, call, info, len)
 			.map(|_| Self::Pre::default())
 			.map_err(Into::into)
 	}
@@ -749,7 +749,7 @@ pub trait SignedExtension: Codec + Debug + Sync + Send + Clone + Eq + PartialEq
 		info: &DispatchInfoOf<Self::Call>,
 		len: usize,
 	) -> Result<Self::Pre, TransactionValidityError> {
-		Self::validate_unsigned(call, info.clone(), len)
+		Self::validate_unsigned(call, info, len)
 			.map(|_| Self::Pre::default())
 			.map_err(Into::into)
 	}