fix: removeObserver

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -875,6 +875,7 @@ static CGFloat itemMargin = 5;
 }
 
 - (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
     // NSLog(@"%@ dealloc",NSStringFromClass(self.class));
 }
 

TZImagePickerController/TZImagePickerController/TZPhotoPreviewController.m

@@ -513,6 +513,7 @@
 #pragma mark - Private Method
 
 - (void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
     // NSLog(@"%@ dealloc",NSStringFromClass(self.class));
 }