Remove unused fields in some structures

The dead_code lint was previously eroneously missing those.
Since this lint bug has been fixed, the unused fields need
to be removed.

Author: krtab

alloc/src/collections/btree/navigate.rs

@@ -655,7 +655,7 @@ impl<BorrowType: marker::BorrowType, K, V> NodeRef<BorrowType, K, V, marker::Lea
 pub enum Position<BorrowType, K, V> {
     Leaf(NodeRef<BorrowType, K, V, marker::Leaf>),
     Internal(NodeRef<BorrowType, K, V, marker::Internal>),
-    InternalKV(Handle<NodeRef<BorrowType, K, V, marker::Internal>, marker::KV>),
+    InternalKV,
 }
 
 impl<'a, K: 'a, V: 'a> NodeRef<marker::Immut<'a>, K, V, marker::LeafOrInternal> {
@@ -677,7 +677,7 @@ impl<'a, K: 'a, V: 'a> NodeRef<marker::Immut<'a>, K, V, marker::LeafOrInternal>
                             visit(Position::Leaf(leaf));
                             match edge.next_kv() {
                                 Ok(kv) => {
-                                    visit(Position::InternalKV(kv));
+                                    visit(Position::InternalKV);
                                     kv.right_edge()
                                 }
                                 Err(_) => return,
@@ -699,7 +699,7 @@ impl<'a, K: 'a, V: 'a> NodeRef<marker::Immut<'a>, K, V, marker::LeafOrInternal>
         self.visit_nodes_in_order(|pos| match pos {
             Position::Leaf(node) => result += node.len(),
             Position::Internal(node) => result += node.len(),
-            Position::InternalKV(_) => (),
+            Position::InternalKV => (),
         });
         result
     }

alloc/src/collections/btree/node/tests.rs

@@ -32,11 +32,7 @@ impl<'a, K: 'a, V: 'a> NodeRef<marker::Immut<'a>, K, V, marker::LeafOrInternal>
                 result += &format!("\n{}{:?}", indent, leaf.keys());
             }
             navigate::Position::Internal(_) => {}
-            navigate::Position::InternalKV(kv) => {
-                let depth = self.height() - kv.into_node().height();
-                let indent = "  ".repeat(depth);
-                result += &format!("\n{}{:?}", indent, kv.into_kv().0);
-            }
+            navigate::Position::InternalKV => {}
         });
         result
     }

test/src/console.rs

@@ -46,7 +46,6 @@ pub struct ConsoleTestDiscoveryState {
     pub tests: usize,
     pub benchmarks: usize,
     pub ignored: usize,
-    pub options: Options,
 }
 
 impl ConsoleTestDiscoveryState {
@@ -56,13 +55,7 @@ impl ConsoleTestDiscoveryState {
             None => None,
         };
 
-        Ok(ConsoleTestDiscoveryState {
-            log_out,
-            tests: 0,
-            benchmarks: 0,
-            ignored: 0,
-            options: opts.options,
-        })
+        Ok(ConsoleTestDiscoveryState { log_out, tests: 0, benchmarks: 0, ignored: 0 })
     }
 
     pub fn write_log<F, S>(&mut self, msg: F) -> io::Result<()>