[cleanup][test] Drop outdated regression test

The regression test for crbug.com/976627 was:
(1) silently failing on all platforms,
(2) very brittle, baking in several internal limits,
(3) highly specific for one particular place in the code,
(4) when fixed, very slow: 6 seconds on x64.release.

For all these reasons, it is herewith dropped.

Bug: v8:10021
Change-Id: Ic144f6bfcca0c301f3aca7840edbdc43f34a77fc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1993975
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65715}

test/mjsunit/mjsunit.status

@@ -249,12 +249,6 @@
   # BUG(v8:9260)
   'tools/profviz': [SKIP],
 
-  # Test doesn't work on 32-bit architectures (it would require a
-  # regexp pattern with too many captures).
-  # TODO(jkummerow/jgruber): Silently fails with pointer compression too.
-  # Fix it or delete it.
-  'regress/regress-976627': [FAIL, ['arch == x64 or arch == arm64 or arch == mips64el or arch == ppc64 or arch == s390x', PASS]],
-
   # OOM with too many isolates/memory objects (https://crbug.com/1010272)
   # Predictable tests fail due to race between postMessage and GrowMemory
   # Agressively skipping test for variants, and simulator runs.

test/mjsunit/regress/regress-976627.js

-// Copyright 2019 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax --young-generation-large-objects
-
-function v2() {
-    const v8 = Symbol || 9007199254740991;
-    function v9(v10,v11,v12) {
-    }
-    const v16 = String();
-    const v100 = String();//add
-    const v106 = String();// add
-    const v116 = String();// add
-    const v17 = Int32Array();
-    const v18 = Map();
-    const v19 = [];
-    const v20 = v18.values();
-    function v21(v22,v23,v24,v25,v26) {
-    }
-    function v28(v29,v30,v31) {
-        function v32(v33,v34,v35,v36) {
-        }
-        let v39 = 0;
-        do {
-            const v40 = v32();
-            function v99() {
-            }
-        } while (v39 < 8);
-    }
-    const v41 = Promise();
-}
-const v46 = ["has",13.37,-9007199254740991,Reflect];
-for (let v50 = 64; v50 <= 2000; v50++) {
-    v46.push(v50,v2);
-}
-const v54 = RegExp(v46);
-const v55 = v54.exec();
-
-assertTrue(%HasElementsInALargeObjectSpace(v55));