Make clippy happy

Signed-off-by: hi-rustin <rustin.liu@gmail.com>

Author: 0xPoe

futures-channel/src/lib.rs

@@ -26,7 +26,6 @@
         allow(dead_code, unused_assignments, unused_variables)
     )
 ))]
-#![allow(clippy::if_then_panic)]
 
 #[cfg(not(futures_no_atomic_cas))]
 #[cfg(feature = "alloc")]

futures-task/src/lib.rs

@@ -11,6 +11,7 @@
         allow(dead_code, unused_assignments, unused_variables)
     )
 ))]
+#![allow(clippy::non_send_fields_in_send_ty)]
 
 #[cfg(feature = "alloc")]
 extern crate alloc;

futures-test/src/lib.rs

@@ -14,7 +14,6 @@
         allow(dead_code, unused_assignments, unused_variables)
     )
 ))]
-#![allow(clippy::if_then_panic)]
 
 #[cfg(not(feature = "std"))]
 compile_error!(

futures-util/src/lib.rs

@@ -19,6 +19,7 @@
     )
 ))]
 #![cfg_attr(docsrs, feature(doc_cfg))]
+#![allow(clippy::non_send_fields_in_send_ty)]
 
 #[cfg(all(feature = "bilock", not(feature = "unstable")))]
 compile_error!("The `bilock` feature requires the `unstable` feature as an explicit opt-in to unstable features");