Remove imagemagick-native module from benchmarks

Unmaintained, does not compile with newer ImageMagick and Node

docs/performance.md

@@ -10,7 +10,6 @@
 
 * [jimp](https://www.npmjs.com/package/jimp) v0.5.3 - Image processing in pure JavaScript. Provides bicubic interpolation.
 * [mapnik](https://www.npmjs.org/package/mapnik) v4.0.1 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
-* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) v1.9.3 - Wrapper around libmagick++, supports Buffers only.
 * [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
 * [gm](https://www.npmjs.com/package/gm) v1.23.1 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
 * sharp v0.21.0 / libvips v8.7.0 - Caching within libvips disabled to ensure a fair comparison.
@@ -28,7 +27,6 @@ then compress to JPEG at a "quality" setting of 80.
 | jimp               | buffer | buffer |    0.71 |      1.0 |
 | mapnik             | buffer | buffer |    3.32 |      4.7 |
 | gm                 | buffer | buffer |    3.97 |      5.6 |
-| imagemagick-native | buffer | buffer |    4.06 |      5.7 |
 | imagemagick        | file   | file   |    4.24 |      6.0 |
 | sharp              | stream | stream |   25.30 |     35.6 |
 | sharp              | file   | file   |   26.17 |     36.9 |

test/bench/package.json

@@ -12,7 +12,6 @@
     "benchmark": "^2.1.4",
     "gm": "^1.23.1",
     "imagemagick": "^0.1.3",
-    "imagemagick-native": "^1.9.3",
     "jimp": "^0.6.4",
     "mapnik": "^4.2.1",
     "semver": "^6.1.2"

test/bench/perf.js

@@ -12,12 +12,6 @@ const gm = require('gm');
 const imagemagick = require('imagemagick');
 const mapnik = require('mapnik');
 const jimp = require('jimp');
-let imagemagickNative;
-try {
-  imagemagickNative = require('imagemagick-native');
-} catch (err) {
-  console.log('Excluding imagemagick-native');
-}
 
 const fixtures = require('../fixtures');
 
@@ -126,29 +120,6 @@ async.series({
         });
       }
     });
-    // imagemagick-native
-    if (typeof imagemagickNative !== 'undefined') {
-      jpegSuite.add('imagemagick-native-buffer-buffer', {
-        defer: true,
-        fn: function (deferred) {
-          imagemagickNative.convert({
-            srcData: inputJpgBuffer,
-            quality: 80,
-            width: width,
-            height: height,
-            format: 'JPEG',
-            filter: 'Lanczos'
-          }, function (err, buffer) {
-            if (err) {
-              throw err;
-            } else {
-              assert.notStrictEqual(null, buffer);
-              deferred.resolve();
-            }
-          });
-        }
-      });
-    }
     // gm
     jpegSuite.add('gm-buffer-file', {
       defer: true,
@@ -698,22 +669,6 @@ async.series({
         });
       }
     });
-    // imagemagick-native
-    if (typeof imagemagickNative !== 'undefined') {
-      pngSuite.add('imagemagick-native-buffer-buffer', {
-        defer: true,
-        fn: function (deferred) {
-          imagemagickNative.convert({
-            srcData: inputPngBuffer,
-            width: width,
-            height: height,
-            format: 'PNG',
-            filter: 'Lanczos'
-          });
-          deferred.resolve();
-        }
-      });
-    }
     // gm
     pngSuite.add('gm-file-file', {
       defer: true,