Revert "Unittest: Gültige"

This reverts commit 378b499b1c

src/test/test_duellist_spielesammlung_projekt.c

@@ -89,19 +89,6 @@ void test_valid_move_and_switch_player(void) {
 }
 
 
-void test_invalid_input(void) {
-    // Arrange
-    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
-                                     {EMPTY, EMPTY, EMPTY},
-                                     {EMPTY, EMPTY, EMPTY}},
-                          .currentPlayer = PLAYER_O };
-
-    // Act
-    GameResult result = makeMove(&game, 0, 0);
-
-    // Assert
-    TEST_ASSERT_EQUAL(INVALID_MOVE, result);
-}