Remove unused code or unused features.
删除不用的代码或者特性。
Has unused code been removed? Have all unnecessary comments been removed?
没有的代码是否已经删除？所有的无用注解是否删除？
On the other hand, dead, unused code only clutters a program and makes it harder to read and understand, so delete it.
另一方面，无效的，废弃的代码只会使程序变得拥挤不堪，难于阅读和理解，所以还是删掉的好。
Tree Shaker walks the dependency graph, top to bottom, and shakes out unused code like dead needles in a Christmas tree.
摇树优化器从上到下遍历依赖图谱，并且摇掉用不到的代码，这些代码就像是圣诞树中那些死掉的松针一样。
Remove unused plugins: They slow down your blog by adding unnecessary, unused code that still has to load every time somebody accesses your page.
移除不需要的插件：无用的插件会使你的博客变慢，因为它们增加页面受访问时加载的不必要、不可用的代码。
Lots of systems suffer from the extremes: clumped, lengthy code with little abstractions, or an overly designed system with unnecessary complexity and unused code.
很多系统的设计会走向极端：缺乏抽象的冗长的代码，或是充斥着复杂的从不使用的代码。
Although unused imports do not affect runtime performance, they can confuse the reader and affect the readability of the code.
尽管未使用的导入不会影响到运行时的性能，但是它们会混淆读者的思想并影响代码的可读性。
As before, the above piece of code contains all of the logic that is needed to identify unused imports within a source file.
在以前，代码的以上部分包含了一个源文件内识别未使用导入所需要的一切逻辑。
The GWT compiler does a good job at reducing code size but cutting unused methods and obfuscating code to use short variable and function names, but the result is still uncompressed text.
通过去掉未被调用的方法和艰涩的代码、使用简短的变量名和方法名等方式，GWT编译器在减少代码量方面表现得非常出色，但是最后得到的代码文本仍然是未经压缩的。
In either case, overdesign takes extra time and produces code that is either unused or doesn't fit the needs of the project.
还有另外一种情况，过度设计花费了额外的时间，产生的代码不是不能使用就是不符合项目的需求。
Unused This code was used in a previous version. It is no longer used, but the code is reserved.
该代码仅在先前版本中支持。当前版本已不再支持该代码，但是代码部分仍将保留。
Unused This code was used in a previous version. It is no longer used, but the code is reserved.
该代码仅在先前版本中支持。当前版本已不再支持该代码，但是代码部分仍将保留。
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