Remove OnboardingHighlights feature flag

Author: alessandroboron

iOS/Core/FeatureFlag.swift

@@ -93,9 +93,6 @@ public enum FeatureFlag: String {
     /// https://app.asana.com/1/137249556945/project/1211834678943996/task/1211866468401462
     case syncPromotionPasswords
 
-    /// https://app.asana.com/1/137249556945/project/1211834678943996/task/1211866468468677
-    case onboardingHighlights
-
     /// https://app.asana.com/1/137249556945/project/1211834678943996/task/1211866468574274
     case onboardingAddToDock
 
@@ -398,7 +395,6 @@ extension FeatureFlag: FeatureFlagDescribing {
                .sslCertificatesBypass,
                .syncPromotionBookmarks,
                .syncPromotionPasswords,
-               .onboardingHighlights,
                .onboardingAddToDock,
                .autofillSurveys,
                .autocompleteTabs,
@@ -469,8 +465,6 @@ extension FeatureFlag: FeatureFlagDescribing {
             return .remoteReleasable(.subfeature(SyncPromotionSubfeature.bookmarks))
         case .syncPromotionPasswords:
             return .remoteReleasable(.subfeature(SyncPromotionSubfeature.passwords))
-        case .onboardingHighlights:
-            return .internalOnly()
         case .onboardingAddToDock:
             return .internalOnly()
         case .autofillSurveys:

iOS/Core/UserDefaultsPropertyWrapper.swift

@@ -191,7 +191,6 @@ public struct UserDefaultsWrapper<T> {
         case autoClearAIChatHistory = "com.duckduckgo.ios.autoClearAIChatHistory"
 
         // Debug keys
-        case debugOnboardingHighlightsEnabledKey = "com.duckduckgo.ios.debug.onboardingHighlightsEnabled"
         case debugWebViewStateRestorationEnabledKey = "com.duckduckgo.ios.debug.webViewStateRestorationEnabled"
         case debugDefaultBrowserPromptCurrentDateKey = "com.duckduckgo.ios.debug.defaultBrowserPromptCurrentDate"