[gnome-chess] Revert "King and bishop can checkmate king and bishop of opposite color"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 21496597e3cda74acec459d57475deff0392105e
Author: Michael Catanzaro <mike catanzaro gmail com>
Date:   Mon May 27 13:43:23 2013 -0500

    Revert "King and bishop can checkmate king and bishop of opposite color"
    
    This reverts commit af8f4d798d0bb0568233b3d275356d8633e51bc8.
    
    Needs updated tests before it can be released

 NEWS                |    1 -
 src/chess-game.vala |    9 ---------
 2 files changed, 0 insertions(+), 10 deletions(-)
---
diff --git a/NEWS b/NEWS
index fd1f989..2e883da 100644
--- a/NEWS
+++ b/NEWS
@@ -12,7 +12,6 @@ gnome-chess 3.9.2
 * Each player's clock is now initially set to half the game's total duration
 * The clock now begins counting down only after White's first move
 * The clock now stops counting down once the game is over
-* Further improve the algorithm for determining insufficient material
 * Stop the engine immediately when the game ends, not when the next game starts
 * Sensibly set the sensitivity of Smooth Display and Piece Style preferences
   depending on if 3D view is enabled
diff --git a/src/chess-game.vala b/src/chess-game.vala
index b501c8f..0bd80d6 100644
--- a/src/chess-game.vala
+++ b/src/chess-game.vala
@@ -1001,15 +1001,6 @@ public class ChessState
                 return true;
             if ((black_bishop_count > 0 || black_knight_count > 0) && white_knight_count > 0)
                 return true;
-
-            /* King and bishop can checkmate vs. king and bishop if bishops are on opposite colors */
-            if (white_bishop_count > 0 && black_bishop_count > 0)
-            {
-                if (white_bishop_on_white_square && black_bishop_on_black_square)
-                    return true;
-                else if (white_bishop_on_black_square && black_bishop_on_white_square)
-                    return true;
-            }
         }
 
         return false;