Remove unnecessary notifyListeners calls

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

example/lib/services/favorite_color_service.dart

@@ -20,8 +20,6 @@ class FavoriteColorService extends ArcaneService {
     if (_notifier.value != newValue) {
       _notifier.value = newValue;
     }
-
-    notifyListeners();
   }
 }
 

lib/src/services/authentication/authentication_service.dart

@@ -67,7 +67,6 @@ class ArcaneAuthenticationService extends ArcaneService {
     _notifier.value = AuthenticationStatus.unauthenticated;
     _isSignedIn.value = isAuthenticated;
     _previousModeWhenSettingDebug = null;
-    notifyListeners();
   }
 
   /// Registers an `ArcaneAuthInterface` within the `ArcaneAuthenticationService`.
@@ -157,7 +156,6 @@ class ArcaneAuthenticationService extends ArcaneService {
       _notifier.value = newStatus;
       _isSignedIn.value = isAuthenticated;
     }
-    notifyListeners();
   }
 
   /// Logs the current user out. Upon successful logout, `status` will be set to

lib/src/services/feature_flags/feature_flags_service.dart

@@ -82,7 +82,6 @@ class ArcaneFeatureFlags extends ArcaneService {
       );
     }
 
-    notifyListeners();
     return I;
   }
 
@@ -111,7 +110,6 @@ class ArcaneFeatureFlags extends ArcaneService {
       );
     }
 
-    notifyListeners();
     return I;
   }
 
@@ -121,12 +119,9 @@ class ArcaneFeatureFlags extends ArcaneService {
   /// It is called automatically when enabling or disabling features if they haven't
   /// already been initialized.
   void _init() {
-    _notifier.value = [];
-
-    notifier.addListener(_listener);
-
+    if (I._initialized) return;
+    reset();
     I._initialized = true;
-    notifyListeners();
   }
 
   /// Resets the feature flags to their initial state.
@@ -134,10 +129,11 @@ class ArcaneFeatureFlags extends ArcaneService {
   /// This method clears all enabled features, resets notification values,
   /// marks the flags as uninitialized, and notifies listeners of the changes.
   void reset() {
+    notifier
+      ..removeListener(_listener)
+      ..addListener(_listener);
     _notifier.value = [];
-
     I._initialized = false;
-    notifyListeners();
   }
 
   void _listener() {