Remove passing test from chrome_public_test_apk NS filter

TBR=jam@chromium.org

Bug: 827531
Change-Id: I1d104ee55e7ff56e62eb30d54301696230ef9784
Reviewed-on: https://chromium-review.googlesource.com/c/1302103Reviewed-by: Clark DuVall <cduvall@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603153}

testing/buildbot/filters/mojo.fyi.network_chrome_public_test_apk.filter

@@ -4,9 +4,6 @@
 
 # These tests currently fail when run with --enable-features=NetworkService
 
-# Uncategorized timeouts or test failures.
--org.chromium.chrome.browser.externalnav.UrlOverridingTest.testNavigationFromUserGestureInSubFrame
-
 # Fail because they expect to have no features enabled when run.
 -org.chromium.chrome.browser.FeaturesAnnotationsTest.testFeaturesAddToExistingFlags
 -org.chromium.chrome.browser.FeaturesAnnotationsTest.testFeaturesDoNotRemoveExistingFlags