Cleanup unused code

Related discussion:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1529
- https://github.com/uBlockOrigin/uBlock-issues/discussions/1958#discussioncomment-5257148

src/js/background.js

@@ -63,7 +63,6 @@ const hiddenSettingsDefault = {
     cnameIgnoreRootDocument: true,
     cnameMaxTTL: 120,
     cnameReplayFullURL: false,
-    cnameUncloak: true,
     cnameUncloakProxied: false,
     consoleLogLevel: 'unset',
     debugScriptlets: false,

src/js/logger-ui.js

@@ -52,7 +52,6 @@ let filteredLoggerEntryVoidedCount = 0;
 let popupLoggerBox;
 let popupLoggerTooltips;
 let activeTabId = 0;
-let filterAuthorMode = false;
 let selectedTabId = 0;
 let netInspectorPaused = false;
 let cnameOfEnabled = false;
@@ -1112,8 +1111,6 @@ const onLogBufferRead = function(response) {
         allTabIdsToken = response.tabIdsToken;
     }
 
-    filterAuthorMode = response.filterAuthorMode === true;
-
     if ( activeTabIdChanged ) {
         pageSelectorFromURLHash();
     }

src/js/messaging.js

@@ -1605,7 +1605,6 @@ const getLoggerData = async function(details, activeTabId, callback) {
         activeTabId,
         colorBlind: µb.userSettings.colorBlindFriendly,
         entries: logger.readAll(details.ownerId),
-        filterAuthorMode: µb.hiddenSettings.filterAuthorMode,
         tabIdsToken: µb.pageStoresToken,
         tooltips: µb.userSettings.tooltipsDisabled === false
     };

src/js/start.js

@@ -238,17 +238,6 @@ const onUserSettingsReady = fetched => {
             fetched.externalLists.trim().split(/[\n\r]+/);
     }
 
-    // https://github.com/uBlockOrigin/uBlock-issues/issues/1513
-    //   Transition nicely.
-    //   TODO: remove when current version of uBO is well past 1.34.0.
-    if ( typeof µb.hiddenSettings.cnameUncloak === false ) {
-        fetched.cnameUncloakEnabled = false;
-        µb.hiddenSettings.cnameUncloak = true;
-        µb.saveHiddenSettings();
-    }
-    µb.hiddenSettingsDefault.cnameUncloak = undefined;
-    µb.hiddenSettings.cnameUncloak = undefined;
-
     fromFetch(µb.userSettings, fetched);
 
     if ( µb.privacySettingsSupported ) {