Always generate source maps for browserify

config/grunt_development.json

@@ -1,6 +1,4 @@
 {
-  "browserify_debug": true,
-  "browserify_watch": false,
   "use_minify": false,
   "http_path_prefix": ""
 }

config/grunt_production.json.sample

@@ -1,6 +1,4 @@
 {
-  "browserify_debug": false,
-  "browserify_watch": false,
   "use_minify": true,
   "http_path_prefix": "//cartodb-libs.global.ssl.fastly.net/cartodbui"
 }

lib/build/tasks/browserify.js

@@ -14,9 +14,7 @@ module.exports = {
         watch: '<%= env.browserify_watch %>',
 
         browserifyOptions: {
-          // if true will include source maps
+          debug: true
-          // must be evaluated lazily (using template var) to allow override by setConfig task.
-          debug: '<%= env.browserify_debug %>'
         }
       };