fix clippy errors

Author: hansihe

src/map.rs

@@ -246,7 +246,7 @@ impl<K, V, A: AllocRef + Clone> HashMap<K, V, DefaultHashBuilder, A> {
     /// is first inserted into.
     #[cfg_attr(feature = "inline-more", inline)]
     pub fn new_in(alloc: A) -> Self {
-        Self::with_hasher_in(Default::default(), alloc)
+        Self::with_hasher_in(DefaultHashBuilder::default(), alloc)
     }
 
     /// Creates an empty `HashMap` with the specified capacity using the given allocator.

src/raw/mod.rs

@@ -76,20 +76,18 @@ impl Fallibility {
     /// Error to return on capacity overflow.
     #[cfg_attr(feature = "inline-more", inline)]
     fn capacity_overflow(self) -> CollectionAllocErr {
-        use Fallibility::*;
         match self {
-            Fallible => CollectionAllocErr::CapacityOverflow,
-            Infallible => panic!("Hash table capacity overflow"),
+            Fallibility::Fallible => CollectionAllocErr::CapacityOverflow,
+            Fallibility::Infallible => panic!("Hash table capacity overflow"),
         }
     }
 
     /// Error to return on allocation error.
     #[cfg_attr(feature = "inline-more", inline)]
     fn alloc_err(self, layout: Layout) -> CollectionAllocErr {
-        use Fallibility::*;
         match self {
-            Fallible => CollectionAllocErr::AllocErr { layout },
-            Infallible => handle_alloc_error(layout),
+            Fallibility::Fallible => CollectionAllocErr::AllocErr { layout },
+            Fallibility::Infallible => handle_alloc_error(layout),
         }
     }
 }