Removed unnecessary class GameBoard

src/main/java/com/example/tictactoeswtha2/GameBoard.java

-package com.example.tictactoeswtha2;
-
-public class GameBoard {
-    /**
-     * 3x3 game board
-     */
-    private int[][] board = new int[3][3];
-
-
-    /**
-     * Initialize every position with 0
-     */
-    public void GameBoard(){
-        for (int y = 0; y < 3; y++){
-            for (int x = 0; x < 3; x++){
-                board[y][x] = 0;
-            }
-        }
-    }
-
-
-    /**
-     * Tries to place a symbol on the board
-     * @param position Position where the symbol should be placed 1-9
-     * @param symbol Symbol that should be placed
-     * @return Whether the symbol could be placed
-     */
-    public boolean addSymbol(int position, int symbol){
-        int x = position % 3 + 1;
-        int y = position / 3;
-
-        if (board[y][x] > 0)
-                return false;
-
-        board[y][x] = symbol;
-
-        return true;
-    }
-
-    /**
-     * Checks if the game is finished
-     * 0: game isn't finished yet
-     * 1: Player 1 won
-     * 2: Player 2 won
-     * 3: tie
-     * @return Winner or tie or unfinished
-     */
-    public int winCheck(){
-        for (int i = 0; i < 3; i++){
-            // vertical
-            if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[0][i] > 0)
-                return board[0][i];
-            // horizontal
-            if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] > 0)
-                return board[i][0];
-        }
-        // diagonal
-        if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] > 0)
-            return board[1][1];
-        if (board[2][0] == board[1][1] && board[1][1] == board[0][2] && board[1][1] > 0)
-            return board[1][1];
-
-
-
-
-        // game isn't finished
-        for (int i = 0; i < 9; i++) {
-            int x = i % 3 + 1;
-            int y = i / 3;
-            if (board[y][x] == 0)
-                return 0;
-        }
-
-
-        // Tie
-        return 3;
-
-    }
-
-    /**
-     * Gives back the game board to display it
-     * @return Game board
-     */
-    public int[][] getBoard() {
-        return board;
-    }
-
-
-    /**
-     * Prints the board on the console for debugging
-     */
-    public void printOnConsole(){
-        for (int y = 0; y < 3; y++){
-            for (int x = 0; x < 3; x++){
-                System.out.printf(Integer.toString(board[y][x]));
-            }
-            System.out.printf("\n");
-
-        }
-
-
-    }
-}