Pattern: Unnecessary field initialization
Issue: -
Do not unnecessarily initialize the fields of a class to values they
already have. For example, there is no need to explicitly set a field to
undefined in the field's initialization or in the class' constructor.
Also, if a field is initialized to a constant value (null, a string, a
boolean, or some number) then there is no need to reassign the field to
this value within the class constructor.