Remove Display trait from main structs

src/board.rs

@@ -1,4 +1,3 @@
-use std::fmt;
 use u64 as Bitboard;
 
 use crate::attack::{
@@ -139,28 +138,7 @@ impl Default for Board {
     }
 }
 
-impl fmt::Display for Board {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        for piece in &self.white_pieces {
-            writeln!(
-                f,
-                "Color: {:?}\nKind: {:?}\n{piece}",
-                piece.color, piece.kind
-            )?;
-        }
-        writeln!(f)?;
-        for piece in &self.black_pieces {
-            writeln!(
-                f,
-                "Color: {:?}\nKind: {:?}\n{piece}",
-                piece.color, piece.kind
-            )?;
-        }
-        writeln!(f)
-    }
-}
-
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Eq, Clone)]
 pub struct Piece {
     pub bitboard: Bitboard,
     pub kind: Kind,
@@ -177,21 +155,7 @@ impl Piece {
     }
 }
 
-impl fmt::Display for Piece {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        for rank in (0..8).rev() {
-            for file in 0..8 {
-                let square = 1 << (rank * 8 + file);
-                let position = if square & self.bitboard != 0x0 { 1 } else { 0 };
-                write!(f, "{} ", position)?;
-            }
-            writeln!(f)?;
-        }
-        writeln!(f)
-    }
-}
-
-#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum Kind {
     Pawn,
     Knight,