Fix ordered comparison warnings in the RTPtimeshift unit test
Fix ordered comparison warnings in the RTPtimeshift unit test

Original CL uploaded here: http://review.webrtc.org/933013/

Removing the checks if (argv[4/5] >= 0), they are not doing anything useful.

BUG=

Review URL: https://webrtc-codereview.appspot.com/933019

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: d0acdf6e2bc073dbe2f65058c1e4cda39ce097be

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