Don't repeat inferred generic types in quick-info

[ghost]

TypeScript Version: nightly (2.3.0-dev.20170314)

Code

[1, 2, 3].map(n => ({ x: n, y: n }));

Hover over map.

Expected behavior:

(method) Array<number>.map<U>(callbackfn: (value: number, index: number, array: number[]) => U, thisArg?: any): U[] (+ 4 overloads)
(inferred) U = {
	x: number;
	y: number;
}

Actual behavior:

(method) Array<number>.map<{
    x: number;
    y: number;
}>(callbackfn: (value: number, index: number, array: number[]) => {
    x: number;
    y: number;
}, thisArg?: any): {
    x: number;
    y: number;
}[] (+4 overloads)

This is long enough that reading the documentation in VSCode's quick info window requires scrolling down!

Mentioned this to @DanielRosenwasser and @sandersn earlier today.

[ghost]

Not quite a duplicate of #14662, but strongly related. Although in this case I'm still suggesting showing all the type info, just not repeating it.