Remove a disabled test.
Remove a disabled test.

ConstrainsSetCodecsAccordingToEncoderConfig has been removed from
webrtcvideoengine_unittest.cc, removing this one as well.

BUG=1788
R=wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/21949004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 8aed9458428e715372cbabbbd6ea376eeb805dd9

sippet/talk,sippet/talk,sippet/talk,sippet/talk,sippet/talk