Simplify build tasks

Author: garyb

Gruntfile.js

@@ -9,10 +9,7 @@ module.exports = function(grunt) {
       "bower_components/purescript-*/src/**/*.purs",
     ],
 
-    clean: {
-      dedupe: ["bower_components/purescript-maybe"],
-      lib: ["js", "externs"]
-    },
+    clean: ["output"],
 
     pscMake: ["<%=libFiles%>"],
     dotPsci: ["<%=libFiles%>"]
@@ -22,6 +19,6 @@ module.exports = function(grunt) {
   grunt.loadNpmTasks("grunt-contrib-clean");
   grunt.loadNpmTasks("grunt-purescript");
 
-  grunt.registerTask("make", ["clean:dedupe", "pscMake", "dotPsci"]);
+  grunt.registerTask("make", ["pscMake", "dotPsci"]);
   grunt.registerTask("default", ["make"]);
 };