Remove centreSampling option, update some expected test fixtures

See https://github.com/jcupitt/libvips/issues/705

lib/constructor.js

@@ -147,8 +147,6 @@ const Sharp = function (input, options) {
     extendRight: 0,
     withoutEnlargement: false,
     kernel: 'lanczos3',
-    interpolator: 'bicubic',
-    centreSampling: false,
     fastShrinkOnLoad: true,
     // operations
     background: [0, 0, 0, 255],

lib/resize.js

@@ -71,8 +71,6 @@ const kernel = {
  * @param {Object} [options]
  * @param {String} [options.kernel='lanczos3'] - the kernel to use for image reduction.
  * @param {Boolean} [options.fastShrinkOnLoad=true] - take greater advantage of the JPEG and WebP shrink-on-load feature, which can lead to a slight moiré pattern on some images.
- * @param {Boolean} [options.centreSampling=false] - use *magick centre sampling convention instead of corner sampling.
- * @param {Boolean} [options.centerSampling=false] - alternative spelling of centreSampling.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -104,11 +102,6 @@ function resize (width, height, options) {
         throw is.invalidParameterError('kernel', 'valid kernel name', options.kernel);
       }
     }
-    // Centre sampling
-    options.centreSampling = is.bool(options.centerSampling) ? options.centerSampling : options.centreSampling;
-    if (is.defined(options.centreSampling)) {
-      this._setBooleanOption('centreSampling', options.centreSampling);
-    }
     // Shrink on load
     if (is.defined(options.fastShrinkOnLoad)) {
       this._setBooleanOption('fastShrinkOnLoad', options.fastShrinkOnLoad);