cleanup some compiler warnings/errors (#422)

Co-authored-by: rexmas <rex@RexbookPro.local>

Author: rexmas

proptest/src/arbitrary/_std/sync.rs

@@ -78,15 +78,15 @@ fn wtr_false() -> WaitTimeoutResult {
     });
     let lock = Mutex::new(());
     let wt = cvar.wait_timeout(lock.lock().unwrap(), Duration::from_millis(1));
-    let (_, wtr) = wt.unwrap();
+    let (_unused, wtr) = wt.unwrap();
     wtr
 }
 
 fn wtr_true() -> WaitTimeoutResult {
     let cvar = Condvar::new();
     let lock = Mutex::new(());
     let wt = cvar.wait_timeout(lock.lock().unwrap(), Duration::from_millis(0));
-    let (_, wtr) = wt.unwrap();
+    let (_unused, wtr) = wt.unwrap();
     wtr
 }
 

proptest/src/strategy/mod.rs

@@ -27,7 +27,6 @@ pub use self::flatten::*;
 pub use self::fuse::*;
 pub use self::just::*;
 pub use self::lazy::*;
-pub use self::lazy::*;
 pub use self::map::*;
 pub use self::recursive::*;
 pub use self::shuffle::*;

proptest/src/test_runner/failure_persistence/mod.rs

@@ -22,7 +22,6 @@ mod noop;
 #[cfg(feature = "std")]
 pub use self::file::*;
 pub use self::map::*;
-pub use self::noop::*;
 
 use crate::test_runner::Seed;