dead code removal

src/repr/board.rs

@@ -1,11 +1,7 @@
 use super::{bitboard::BitBoard, piece::Piece, CoordAxis, CoordPair};
 use arrayvec::ArrayVec;
 use rand::seq::IteratorRandom;
-use std::{
-    cmp::Ordering,
-    fmt,
-    ops::{BitAndAssign, BitOrAssign},
-};
+use std::{cmp::Ordering, fmt};
 
 /// Map of all points on the board against some type T
 /// Used to index like so: example[i][j]