Tab Search: Remove deprecated dependency, kOutOfBlinkCors

Bug: 1099917
Change-Id: Icc72b9bde3157f2d603173340e5c000e0b33474c
Reviewed-on: https://chrome-internal-review.googlesource.com/c/chrome/browser/resources/tab_search/+/3272131Reviewed-by: Tom Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819599}

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

@@ -28,7 +28,6 @@ var TabSearchInteractiveUITest = class extends PolymerInteractiveUITest {
   get featureList() {
     return {
       enabled: [
-        'network::features::kOutOfBlinkCors',
         'features::kTabSearch',
       ]
     };