mmdevapi/tests: Remove an unused assignment (PVS-Studio)

[Michael Stefaniuc]

On 03/06/2015 10:11 AM, Marvin wrote:
> Hi,
> 
> While running your changed tests on Windows, I think I found new failures.
> Being a bot and all I'm not very good at pattern recognition, so I might be
> wrong, but could you please double-check?
> Full results can be found at
> https://testbot.winehq.org/JobDetails.pl?Key=11941
> 
> Your paranoid android.
> 
> 
> === w7u (32 bit render) ===
> render.c:1975: Test failed: Got wrong volume: 0.501088
> render.c:2004: Test failed: Got wrong volume: 0.501088
> 
> === w8 (32 bit render) ===
> render.c:1975: Test failed: Got wrong volume: 0.671337
> render.c:2004: Test failed: Got wrong volume: 0.671337
Unrelated. My no-op change is to test_clock() while the failures are in
test_session_creation()

bye
	michael