Remove deprecated dependency, kOutOfBlinkCors

Change-Id: I380bc7ce1b8bf17d8fe95dbb6bb92e9222efd11d
Bug: 1126827, 1099917, 1053866
Reviewed-on: https://chrome-internal-review.googlesource.com/c/chrome/browser/resources/tab_search/+/3263707Reviewed-by: Yuheng Huang <yuhengh@chromium.org>
Reviewed-by: Tom Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819597}

chrome/browser/resources/tab_search_merge/test/tab_search_browsertest.js

@@ -26,7 +26,6 @@ class TabSearchBrowserTest extends PolymerTest {
   get featureList() {
     return {
       enabled: [
-        'network::features::kOutOfBlinkCors',
         'features::kTabSearch',
       ]
     };