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:

function logAnything<T>(x: T): void;

Good:

function logAnything(x: any): void;

Bad:

function useLogger<T extends Logger>(logger: T): void;

Good:

function useLogger(logger: Logger): void;