Revert "Implement history support"

* This reverts commit 257a207e98.

* Is broken, so remove feature for now.

src/position.js

@@ -910,9 +910,3 @@ Chess.Position.prototype.unmakeMove = function() {
 
 	return move;
 };
-
-Chess.Position.prototype.getString = function () {
-	return this.madeMoves.map(function(move) {
-		return move.getString().trim();
-	}).join(" ");
-};

src/ui.js

@@ -145,16 +145,6 @@ Chess.UI.prototype.updatePieces = function() {
 	}
 };
 
-Chess.UI.prototype.makeMove = function(move) {
-	this.chessPosition.makeMove(move);
-	var state = "#" + this.chessPosition.getString().trim();
-	if (this.chessPosition.getTurnColor() === Chess.PieceColor.BLACK) {
-		window.history.pushState(null, move.getString(), state);
-	} else {
-		window.history.replaceState(null, move.getString(), state);
-	}
-};
-
 /**
  * Adds chessboard cell hover, and chess piece dragging and dropping capabilities to the chessboard
  */
@@ -223,7 +213,7 @@ Chess.UI.prototype.updateMoves = function() {
 
 					if (makeMoves.length > 0) {
 						// TODO: it's possible that there is more than one move (promotions). Either ask the user here or have a droplist somewhere ("promote to")
-						ui.makeMove(makeMoves[0]);
+						ui.chessPosition.makeMove(makeMoves[0]);
 						ui.updateChessPosition();
 					} else {
 						// Dropped to an invalid square
@@ -256,7 +246,7 @@ Chess.UI.prototype.updateMoves = function() {
 		} else if (id === "auto") {
 			ui.doComputerMove();
 		} else {
-			ui.makeMove(moves[parseInt(id, 10)]);
+			ui.chessPosition.makeMove(moves[parseInt(id, 10)]);
 			ui.updateChessPosition();
 		}
 	});
@@ -276,7 +266,7 @@ Chess.UI.prototype.doComputerMove = function() {
 			throw new Error("Move not found");
 		}
 
-		ui.makeMove(move);
+		ui.chessPosition.makeMove(move);
 		var from = $("#" + Chess.getAlgebraicFromIndex(move.getFrom()));
 		var to = $("#" + Chess.getAlgebraicFromIndex(move.getTo()));
 		var dx = (to.offset().left - from.offset().left);
@@ -313,23 +303,11 @@ Chess.UI.prototype.updateChessPosition = function() {
 	}
 };
 
-Chess.UI.prototype.loadState = function() {
-	var moves = window.location.href.split('#');
-	if (moves.length > 1) {
-		this.chessPosition = Chess.Parser.parseMoves(moves[1]);
-	} else {
-		this.chessPosition = new Chess.Position;
-	}
-	this.updateChessPosition();
-};
-
 /**
  * Creates a new chessboard and sets up the game at the standard chess initial position.
  */
 function makeChessGame() {
 	Chess.UI.makeBoard();
 	var ui = new Chess.UI;
-	ui.loadState();
 	ui.updateChessPosition();
-	window.onpopstate = ui.loadState.bind(ui);
 }