refactor: Remove commented and dead code

Sources/Earthquake Network/ViewController/inputView/PickerViewController.m

@@ -63,10 +63,7 @@
     NSDictionary *dict = @{@"indice":indiceElemento, @"elemento" : elemento};
     [self.delegate inviaDati:dict];
 }
-- (void)viewDidUnload {
-    [self setPickerController:nil];
-    [super viewDidUnload];
-}
+
 #pragma mark UIPickerViewDataSource
 
 - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{