Delete left-over file profiler_unittest.cc.
Delete left-over file profiler_unittest.cc.

Was overlooked in cl https://codereview.webrtc.org/2374033002/

BUG=webrtc:6424

Review-Url: https://codereview.webrtc.org/2427283005
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#14758}

TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc