Remove unused roundUpToPowerOfTwo function

src/ol/math.js

@@ -1,7 +1,6 @@
 /**
  * @module ol/math
  */
-import {assert} from './asserts.js';
 
 /**
  * Takes a number and clamps it to within the provided bounds.
@@ -43,16 +42,6 @@ export const cosh = (function() {
 }());
 
 
-/**
- * @param {number} x X.
- * @return {number} The smallest power of two greater than or equal to x.
- */
-export function roundUpToPowerOfTwo(x) {
-  assert(0 < x, 29); // `x` must be greater than `0`
-  return Math.pow(2, Math.ceil(Math.log(x) / Math.LN2));
-}
-
-
 /**
  * Returns the square of the closest distance between the point (x, y) and the
  * line segment (x1, y1) to (x2, y2).