Remove unused createFromQuadKey function

src/ol/tilecoord.js

@@ -26,33 +26,6 @@ ol.QuadKeyCharCode = {
 };
 
 
-/**
- * @param {string} quadKey Quad key.
- * @return {ol.TileCoord} Tile coordinate.
- */
-ol.tilecoord.createFromQuadKey = function(quadKey) {
-  var z = quadKey.length, x = 0, y = 0;
-  var mask = 1 << (z - 1);
-  var i;
-  for (i = 0; i < z; ++i) {
-    switch (quadKey.charCodeAt(i)) {
-      case ol.QuadKeyCharCode.ONE:
-        x += mask;
-        break;
-      case ol.QuadKeyCharCode.TWO:
-        y += mask;
-        break;
-      case ol.QuadKeyCharCode.THREE:
-        x += mask;
-        y += mask;
-        break;
-    }
-    mask >>= 1;
-  }
-  return [z, x, y];
-};
-
-
 /**
  * @param {string} str String that follows pattern “z/x/y” where x, y and z are
  *   numbers.