[llvm] r342935 - [AMDGPU] Remove useless check from test. NFC.

[Matt Arsenault via llvm-commits]

> On Sep 25, 2018, at 11:24 AM, Stanislav Mekhanoshin via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> Author: rampitec
> Date: Mon Sep 24 18:24:54 2018
> New Revision: 342935
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=342935&view=rev
> Log:
> [AMDGPU] Remove useless check from test. NFC.
> 
> The check for assignment of zero is practically useless
> while the assignment moves around with different scheduling.

Since this is the zext test, the zero is relevant