No ticket. Remove the pre-uglify task form build/tasks/build.js. Fix custom...

No ticket. Remove the pre-uglify task form build/tasks/build.js. Fix custom builds. (cherry-picked from 7d5a1237)

build/tasks/build.js

@@ -246,6 +246,6 @@ module.exports = function( grunt ) {
 
 		grunt.log.writeln( "Creating custom build...\n" );
 
-		grunt.task.run([ "build:*:*:" + modules, "pre-uglify", "uglify", "dist" ]);
+		grunt.task.run([ "build:*:*:" + modules, "uglify", "dist" ]);
 	});
 };