Remove previous webrtc benchmark owner

This is a followup to
https://chromium-review.googlesource.com/c/chromium/src/+/2566935/5#message-8b391d170d115a9b89c0a985ab0a8a42a208695b

Change-Id: I3c63a4792d26206a9cb91136ce9da72edcb1b70e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2573038
Commit-Queue: John Chen <johnchen@chromium.org>
Auto-Submit: Ben Wagner aka dogben <benjaminwagner@google.com>
Reviewed-by: Mirko Bonadei <mbonadei@chromium.org>
Reviewed-by: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833792}

tools/perf/benchmark.csv

@@ -71,4 +71,4 @@ v8.browsing_mobile,"mythria@chromium.org, tmrts@chromium.org",Blink>JavaScript,,
 v8.browsing_mobile-future,"mythria@chromium.org, tmrts@chromium.org",Blink>JavaScript,,"2018,2019,2020,emerging_market,health_check,images,infinite_scroll,international,javascript_heavy"
 v8.runtime_stats.top_25,"mythria@chromium.org, ulan@chromium.org",Blink>JavaScript,,"cold,hot,warm"
 views_perftests,tapted@chromium.org,Internals>Views,,
-webrtc,"qiangchen@chromium.org, mbonadei@chromium.org, phoglund@chromium.org",Blink>WebRTC,http://bit.ly/webrtc-benchmark,"datachannel,getusermedia,pauseplay,smoothness,stress,videoConstraints"
+webrtc,"qiangchen@chromium.org, mbonadei@chromium.org",Blink>WebRTC,http://bit.ly/webrtc-benchmark,"datachannel,getusermedia,pauseplay,smoothness,stress,videoConstraints"

tools/perf/benchmarks/webrtc.py

@@ -10,8 +10,7 @@ from benchmarks import press
 
 
 @benchmark.Info(emails=['qiangchen@chromium.org', # For smoothness metrics
-                        'mbonadei@chromium.org',
-                        'phoglund@chromium.org'],
+                        'mbonadei@chromium.org'],
                 component='Blink>WebRTC',
                 documentation_url='http://bit.ly/webrtc-benchmark')
 class WebrtcPerfBenchmark(press._PressBenchmark):  # pylint: disable=protected-access