Bug 1847285 - Remove unused devtools.storage.test.forceLegacyActors r=devtools-reviewers,jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D185467

devtools/server/tests/browser/storage-helpers.js

@@ -8,8 +8,6 @@
 
 "use strict";
 
-const LEGACY_ACTORS_PREF = "devtools.storage.test.forceLegacyActors";
-
 /**
  * This generator function opens the given url in a new tab, then sets up the
  * page by waiting for all cookies, indexedDB items etc. to be created.
@@ -19,11 +17,6 @@ const LEGACY_ACTORS_PREF = "devtools.storage.test.forceLegacyActors";
  * @return {Promise} A promise that resolves after storage inspector is ready
  */
 async function openTabAndSetupStorage(url) {
-  // Enable testing prefs
-  SpecialPowers.pushPrefEnv({
-    set: [[LEGACY_ACTORS_PREF, true]],
-  });
-
   await addTab(url);
 
   // Setup the async storages in main window and for all its iframes

modules/libpref/init/all.js

@@ -726,10 +726,6 @@ pref("devtools.performance.popup.intro-displayed", false);
 // Stringified array of target browsers that users investigate.
 pref("devtools.inspector.compatibility.target-browsers", "");
 
-// Storage preferencex
-// Force instancing legacy storage actors
-pref("devtools.storage.test.forceLegacyActors", false);
-
 // view source
 pref("view_source.editor.path", "");
 // allows to add further arguments to the editor; use the %LINE% placeholder