valast: remove redundant type

[rizalgowandy]

Description

One of the built-in Goland linter gives warning about the redundant type. It would be nice if the generated result doesn't contain redundant fields. Help the code become cleaner.

Problem

Redundant type 
 Inspection info: Reports redundant types in composite literals.
For example:
    [][]int{[]int{1}, []int{2}}
can be simplified to:
    [][]int {{1}, {2}}
.

Example in Goland

The grey-out fields are redundant types.

[emidoots]

Totally agree, and plan to look into fixing this soon. Thanks for reporting!