Update perf_tests/dom owners

A follow-up CL of https://crrev.com/c/1325271.

BUG=902661,903666

Change-Id: I877f4239ffb8ab92225086968dca5dbb729678cf
Reviewed-on: https://chromium-review.googlesource.com/c/1328541Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#609265}

tools/perf/benchmark.csv

@@ -7,7 +7,7 @@ blink_perf.accessibility,dmazzoni@chromium.org,Blink>Accessibility,https://bit.l
 blink_perf.bindings,"jbroman@chromium.org, yukishiino@chromium.org, haraken@chromium.org",Blink>Bindings,https://bit.ly/blink-perf-benchmarks,
 blink_perf.canvas,"aaronhk@chromium.org, fserb@chromium.org",Blink>Canvas,https://bit.ly/blink-perf-benchmarks,
 blink_perf.css,"futhark@chromium.org, andruud@chromium.org",Blink>CSS,https://bit.ly/blink-perf-benchmarks,
-blink_perf.dom,"hayato@chromium.org, tkent@chromium.org, yosin@chromium.org",Blink>DOM,https://bit.ly/blink-perf-benchmarks,
+blink_perf.dom,"hayato@chromium.org, tkent@chromium.org",Blink>DOM,https://bit.ly/blink-perf-benchmarks,
 blink_perf.events,hayato@chromium.org,Blink>DOM,https://bit.ly/blink-perf-benchmarks,
 blink_perf.image_decoder,cblume@chromium.org,Internals>Images>Codecs,https://bit.ly/blink-perf-benchmarks,
 blink_perf.layout,eae@chromium.org,,https://bit.ly/blink-perf-benchmarks,

tools/perf/benchmarks/blink_perf.py

@@ -434,8 +434,7 @@ class BlinkPerfCanvas(_BlinkPerfBenchmark):
     return story_set
 
 @benchmark.Info(emails=['hayato@chromium.org',
-                        'tkent@chromium.org',
-                        'yosin@chromium.org'],
+                        'tkent@chromium.org'],
                 component='Blink>DOM',
                 documentation_url='https://bit.ly/blink-perf-benchmarks')
 class BlinkPerfDOM(_BlinkPerfBenchmark):