[cleanup] Delete Array#remove test case that got ported to unit test

The same functionality is already tested here:

https://source.chromium.org/chromium/chromium/src/+/a15fa1cd393dd9672d412a08cb7397ff06714f8a:third_party/devtools-frontend/src/test/unittests/front_end/platform/utilities.ts;l=36

So the layout test version can safely be removed.

R=petermarshall@chromium.org

Bug: chromium:1050549
Change-Id: Ibb1f95bf77255f0d55d89d6d6a80343e988daf02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095065
Commit-Queue: Simon Zünd <szuend@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Auto-Submit: Simon Zünd <szuend@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748209}

third_party/blink/web_tests/http/tests/devtools/components/utilities-expected.txt

 This test checks Web Inspector utilities.
 
 
-Running: remove
-
 Running: orderedMergeIntersect
 
 Running: binaryIndexOfTest

third_party/blink/web_tests/http/tests/devtools/components/utilities.js

@@ -8,24 +8,6 @@
 
 
   TestRunner.runTestSuite([
-    function remove(next) {
-      var testArrays = [
-        [], [], [], [1], [1], [1], [1, 2, 3, 4, 5, 4, 3, 2, 1], [1, 3, 4, 5, 4, 3, 2, 1], [1, 3, 4, 5, 4, 3, 1],
-        [2, 2, 2, 2, 2], [2, 2, 2, 2], [], [2, 2, 2, 1, 2, 2, 3, 2], [2, 2, 1, 2, 2, 3, 2], [1, 3]
-      ];
-      for (var i = 0; i < testArrays.length; i += 3) {
-        var actual = testArrays[i].slice(0);
-        var expected = testArrays[i + 1];
-        actual.remove(2, true);
-        TestRunner.assertEquals(JSON.stringify(expected), JSON.stringify(actual), 'remove(2, true) passed');
-        actual = testArrays[i].slice(0);
-        expected = testArrays[i + 2];
-        actual.remove(2, false);
-        TestRunner.assertEquals(JSON.stringify(expected), JSON.stringify(actual), 'remove(2, false) passed');
-      }
-      next();
-    },
-
     function orderedMergeIntersect(next) {
       function comparator(a, b) {
         return a - b;