https://github.com/microsoft/dtslint/blob/master/docs/no-unnecessary-generics.md

no-unnecessary-generics

Forbids a function to use a generic type parameter only once. Generic type parameters allow you to relate the type of one thing to another; if they are used only once, they can be replaced with their type constraint.

Bad:

functionlogAnything<T>(x:T):void;

Good:

functionlogAnything(x:any):void;

Bad:

functionuseLogger<TextendsLogger>(logger:T):void;

Good:

functionuseLogger(logger:Logger):void;