Bug 1776207: Part 2 - Don't load StartupRecorder in content processes. r=florian

It isn't actually used in content processes, and causes failures in
non-Nightly/debug builds, where it isn't loaded.

Differential Revision: https://phabricator.services.mozilla.com/D150192

browser/base/content/test/performance/browser_startup_content.js

@@ -21,7 +21,6 @@ const kDumpAllStacks = false;
 const known_scripts = {
   modules: new Set([
     "chrome://mochikit/content/ShutdownLeaksCollector.jsm",
-    "resource:///modules/StartupRecorder.jsm",
 
     // General utilities
     "resource://gre/modules/AppConstants.jsm",

browser/base/content/test/performance/browser_startup_content_subframe.js

@@ -36,8 +36,6 @@ const known_scripts = {
     // Loaded by this test
     actorModuleURI,
 
-    "resource:///modules/StartupRecorder.jsm",
-
     // General utilities
     "resource://gre/modules/AppConstants.jsm",
     "resource://gre/modules/DeferredTask.jsm",

browser/components/components.conf

@@ -65,12 +65,6 @@ if (buildconfig.substs.get('MOZ_DEBUG') or
                 ProcessSelector.MAIN_PROCESS_ONLY,
             ),
         },
-        'content-process-ready-for-script': {
-            'startupRecorder': (
-                '@mozilla.org/test/startuprecorder;1',
-                ProcessSelector.CONTENT_PROCESS_ONLY,
-            ),
-        },
     }
 
     Classes += [