games: drop chipLay3, it clashed with the other two chip takes

internal/web/static/js/casino-sfx.js

@@ -136,7 +136,7 @@
     // The riffle.
     shuffle: { files: ["cardShuffle"], gain: 0.6 },
     // A clay chip set down on a stack.
-    chip:    { files: ["chipLay1", "chipLay2", "chipLay3"], gain: 0.6, vary: 0.05 },
+    chip:    { files: ["chipLay1", "chipLay2"], gain: 0.6, vary: 0.05 },
     // Chips gathered and slid away.
     sweep:   { files: ["chipsHandle2", "chipsHandle4", "chipsHandle6"], gain: 0.5, vary: 0.03 },
   };