Disable the browser-tests in Google Chrome on the bots

Given that `browsertest` repeatedly timeout in Google Chrome, and considering that Firefox is the primary development target, we stop running them on the bots to avoid having to repeatedly deal with this.

Note that we already disabled these tests *on Windows* almost three years ago, because of stability issues; see PR 14392.

test/driver.js

@@ -609,13 +609,6 @@ class Driver {
         return;
       }
 
-      if (task.noChrome && window?.chrome) {
-        this._log(`Skipping file "${task.file}" (because on Chrome)\n`);
-        this.currentTask++;
-        this._nextTask();
-        return;
-      }
-
       this._log('Loading file "' + task.file + '"\n');
 
       try {

test/test_manifest.json

@@ -10749,8 +10749,7 @@
     "rounds": 1,
     "type": "eq",
     "link": true,
-    "talos": false,
-    "noChrome": true
+    "talos": false
   },
   {
     "id": "issue18956",