Retire piece.cpp

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/Makefile

@@ -34,7 +34,7 @@ PGOBENCH = ./$(EXE) bench 32 1 10 default depth
 
 ### Object files
 OBJS = application.o bitboard.o pawns.o material.o endgame.o evaluate.o main.o \
-	misc.o move.o movegen.o history.o movepick.o search.o piece.o position.o \
+	misc.o move.o movegen.o history.o movepick.o search.o position.o \
 	direction.o tt.o uci.o ucioption.o book.o bitbase.o san.o benchmark.o timeman.o