A dispensable is something pointless and unneeded whose absence would make the code cleaner, more efficient and easier to understand.
A method is filled with explanatory comments.
- Duplicate Code
Two code fragments look almost identical.
- Lazy Class
Understanding and maintaining classes always costs time and money. So if a class doesn't do enough to earn your attention, it should be deleted.
- Data Class
A data class refers to a class that contains only fields and crude methods for accessing them (getters and setters). These are simply containers for data used by other classes. These classes do not contain any additional functionality and cannot independently operate on the data that they own.
- Dead Code
A variable, parameter, field, method or class is no longer used (usually because it is obsolete).
- Speculative Generality
There is an unused class, method, field or parameter.