Remove unnecessary redefinition of PacketLists in rtp_fec_unittest.

R=stefan@webrtc.org

Review URL: https://codereview.webrtc.org/2050273002 .

Cr-Original-Commit-Position: refs/heads/master@{#13109}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: be99ab93564f67d18c7a651639387e9238fb9ae9
1 file changed