Remove mbarbella from OWNERS files.

Change-Id: If076a5431ed62f498f3098a29d65f5d616acd892
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587357Reviewed-by: Abhishek Arya <inferno@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Abhishek Arya <inferno@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836296}

build/sanitizers/OWNERS

@@ -2,7 +2,6 @@ ochang@chromium.org
 eugenis@chromium.org
 glider@chromium.org
 inferno@chromium.org
-mbarbella@chromium.org
 metzman@chromium.org
 rnk@chromium.org
 per-file tsan_suppressions.cc=*

ipc/SECURITY_OWNERS

@@ -14,7 +14,6 @@ joenotcharles@chromium.org
 kenrb@chromium.org
 kerrnel@chromium.org
 kinuko@chromium.org
-mbarbella@chromium.org
 meacer@chromium.org
 mkwst@chromium.org
 mpdenton@chromium.org

testing/libfuzzer/OWNERS

 inferno@chromium.org
 kcc@chromium.org
-mbarbella@chromium.org
 metzman@chromium.org
 ochang@chromium.org

tools/ipc_fuzzer/OWNERS

 inferno@chromium.org
-mbarbella@chromium.org
 tsepez@chromium.org