[cleanup] [ios] Fixed Undetached delegates.

iphone/Maps/Classes/CustomViews/NavigationDashboard/Sound/MWMTextToSpeech.mm

@@ -110,6 +110,11 @@ vector<pair<string, string>> availableLanguages()
   return self;
 }
 
+- (void)dealloc
+{
+  self.speechSynthesizer.delegate = nil;
+}
+
 + (NSString *)ttsStatusNotificationKey { return @"TTFStatusWasChangedFromSettingsNotification"; }
 - (vector<pair<string, string>>)availableLanguages { return _availableLanguages; }
 - (void)setNotificationsLocale:(NSString *)locale

iphone/Maps/Core/Location/MWMLocationManager.mm

@@ -192,6 +192,11 @@ void setPermissionRequested()
   return self;
 }
 
+- (void)dealloc
+{
+  self.locationManager.delegate = nil;
+}
+
 #pragma mark - Add/Remove Observers
 
 + (void)addObserver:(TObserver)observer