PM-19378 remove v1 notification bar path (#13973)

* PM-19378
- Remove NotificationBarAddLoginImproments flag
- Remove divergent paths in various files
- Fix tests to reflect new singular path

* PM-19378
- Remove applyRedesign from relevant files
- Update styling to reflect changes

* remove notification-bar

* edit styling for to accodmmodate v3 in iframe

libs/common/src/enums/feature-flag.enum.ts

@@ -25,7 +25,6 @@ export enum FeatureFlag {
   GenerateIdentityFillScriptRefactor = "generate-identity-fill-script-refactor",
   IdpAutoSubmitLogin = "idp-auto-submit-login",
   InlineMenuPositioningImprovements = "inline-menu-positioning-improvements",
-  NotificationBarAddLoginImprovements = "notification-bar-add-login-improvements",
   NotificationRefresh = "notification-refresh",
   UseTreeWalkerApiForPageDetailsCollection = "use-tree-walker-api-for-page-details-collection",
   MacOsNativeCredentialSync = "macos-native-credential-sync",
@@ -86,7 +85,6 @@ export const DefaultFeatureFlagValue = {
   [FeatureFlag.GenerateIdentityFillScriptRefactor]: FALSE,
   [FeatureFlag.IdpAutoSubmitLogin]: FALSE,
   [FeatureFlag.InlineMenuPositioningImprovements]: FALSE,
-  [FeatureFlag.NotificationBarAddLoginImprovements]: FALSE,
   [FeatureFlag.NotificationRefresh]: FALSE,
   [FeatureFlag.UseTreeWalkerApiForPageDetailsCollection]: FALSE,
   [FeatureFlag.MacOsNativeCredentialSync]: FALSE,