Bug 1666263 - Clean up `doh-rollout.profileCreationThreshold` pref. r=valentin

Differential Revision: https://phabricator.services.mozilla.com/D90861

browser/app/profile/firefox.js

@@ -1944,12 +1944,6 @@ pref("extensions.screenshots.disabled", false);
 // disable uploading to the server.
 pref("extensions.screenshots.upload-disabled", false);
 
-// DoH Rollout: the earliest date of profile creation for which we don't need
-// to show the doorhanger. This is when the version of the privacy statement
-// that includes DoH went live - Oct 31, 2019. This has to be a string because
-// the number is outside the signed 32-bit integer range.
-pref("doh-rollout.profileCreationThreshold", "1572476400000");
-
 // DoH Rollout: whether to enable automatic performance-based TRR-selection.
 // This pref is controlled by a Normandy rollout so we don't overload providers.
 pref("doh-rollout.trr-selection.enabled", false);

browser/components/doh/test/browser/head.js

@@ -55,7 +55,6 @@ const prefs = {
   TRR_SELECT_DRY_RUN_RESULT_PREF: "doh-rollout.trr-selection.dry-run-result",
   PROVIDER_STEERING_PREF: "doh-rollout.provider-steering.enabled",
   PROVIDER_STEERING_LIST_PREF: "doh-rollout.provider-steering.provider-list",
-  PROFILE_CREATION_THRESHOLD_PREF: "doh-rollout.profileCreationThreshold",
 };
 
 const CFR_PREF = "browser.newtabpage.activity-stream.asrouter.providers.cfr";