Drop xml2js and thus mml2json.

(cherry picked from commit bde0d0e2ab)

bin/mml2json.js

@@ -1,69 +0,0 @@
-#!/usr/bin/env node
-
-var xml2js = require('xml2js'),
-    fs = require('fs');
-
-if (!process.argv[2]) {
-    console.log('Please specify a XML file.');
-    process.exit(1);
-}
-
-fs.readFile(process.argv[2], 'utf-8', function(err, data) {
-    if (err) throw err;
-
-    // Replace entities.
-    var entities = {};
-    var match = data.match(/<!ENTITY([^>]|"([^"]|\\")*")+>/g)
-    if (match != null) {
-        match.forEach(function(entity) {
-          var parts = entity.match(/^<!ENTITY\s+(\w+)\s+"(.+)">$/);
-          entities['&' + parts[1] + ';'] = parts[2];
-        });
-    }
-    data = data.replace(/&\w+;/g, function(entity) {
-        return entities[entity];
-    });
-
-    function addAttributes(obj) {
-        if (obj['$']) for (var key in obj['$']) obj[key] = obj['$'][key];
-        delete obj['$'];
-        return obj;
-    }
-
-    function simplifyExternal(obj) {
-        if (obj.src) return obj.src;
-        else return obj;
-    }
-
-    var parser = new xml2js.Parser({
-        explicitRoot: false,
-        explicitArray: false
-    });
-    parser.addListener('end', function(json) {
-        console.log(JSON.stringify(json, function(key, value) {
-            if (!key) {
-                return addAttributes(value);
-            }
-            else if (key === 'Stylesheet') {
-                if (Array.isArray(value)) return value.map(addAttributes).map(simplifyExternal);
-                else return [ simplifyExternal(addAttributes(value)) ];
-            }
-            else if (key === 'Layer' || key === 'Stylesheet') {
-                if (Array.isArray(value)) return value.map(addAttributes);
-                else return [ addAttributes(value) ];
-            }
-            else if (key === 'Datasource') {
-                value = addAttributes(value);
-                value.Parameter.forEach(function(parameter) {
-                    value[parameter['$'].name] = parameter['_'];
-                });
-                delete value.Parameter;
-                return value;
-            }
-            else {
-                return value;
-            }
-        }, 4));
-    });
-    parser.parseString(data);
-});