Build/Test Tools: Remove matchdep as a dependency.

`matchdep` was introduced in [25243] to more easily manage `grunt-*` dependencies. The package has effectively been abandoned upstream, and the functionality can be replaced with a simple loop.

Props desrosj, spacedmonkey, swissspidy.
See #62221.

git-svn-id: https://develop.svn.wordpress.org/trunk@59797 602fd350-edb4-49c9-b593-d223f7449a82

Gruntfile.js

@@ -83,12 +83,46 @@ module.exports = function(grunt) {
 	// First do `npm install` if package.json has changed.
 	installChanged.watchPackage();
 
-	// Load tasks.
-	require('matchdep').filterDev(['grunt-*', '!grunt-legacy-util']).forEach( grunt.loadNpmTasks );
-
 	// Load legacy utils.
 	grunt.util = require('grunt-legacy-util');
 
+	var gruntDependencies = {
+		'contrib': [
+			'clean',
+			'concat',
+			'copy',
+			'cssmin',
+			'jshint',
+			'qunit',
+			'uglify',
+			'watch'
+		],
+		'standard': [
+			'banner',
+			'file-append',
+			'jsdoc',
+			'patch-wordpress',
+			'replace-lts',
+			'rtlcss',
+			'sass',
+			'webpack'
+		]
+	};
+
+	// Load grunt-* tasks.
+	function loadGruntTasks( dependency ) {
+		var contrib = key === 'contrib' ? 'contrib-' : '';
+		grunt.loadNpmTasks( 'grunt-' + contrib + dependency );
+	}
+
+	for ( var key in gruntDependencies ) {
+		if ( ! gruntDependencies.hasOwnProperty( key ) ) {
+			continue;
+		}
+
+		gruntDependencies[key].forEach( loadGruntTasks );
+	}
+
 	// Load PostCSS tasks.
 	grunt.loadNpmTasks('@lodder/grunt-postcss');
 

package.json

@@ -61,7 +61,6 @@
 		"grunt-webpack": "7.0.0",
 		"ink-docstrap": "1.3.2",
 		"install-changed": "1.1.0",
-		"matchdep": "~2.0.0",
 		"postcss": "8.4.49",
 		"prettier": "npm:wp-prettier@2.6.2",
 		"qunit": "~2.23.1",